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Author Topic: PhoenixMiner 4.7c: fastest Ethereum/Ethash miner with lowest devfee (Win/Linux)  (Read 204849 times)
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October 28, 2019, 08:00:11 PM
 #3901

2Gb,4Gb DAG fix, need atleast 1 GPU large enough to generate DAG.

Recently realized in my farm that my 470 4Gb rigs, which were all 6 card setups at the time, were not generating the dag any longer for ETC and then soon after ETH dag approached whatever level it was that pushed my system over the limit. After a day of wondering what to do, I realized a 470 rig I have with 1 8Gb 580 in it was working fine with the other 5 cards being 470 4Gbs. I took apart one of my 580 8Gb rigs and replaced a card on one of the 470 rigs. Mined perfectly fine. Did this to the whole farm and split the gpus essentially so every 4Gb rig has atleast 1 8Gb card in it. As for now this works no issues. I have a p104-100 rig with 1 470 4Gb in it and same thing, generated dag and mines.

I tested this on 2Gb R7 200 gpus and works perfectly fine. Card generates the dag as long as the system has one available card that is able to fit the dag on it. This is identical to how the 470 rigs are operating.

The same goes for 470 4Gbs with rx 5700s and the same with the R7 200s with the rx 5700s.

It sounds like 4GB isn't enough for the DAG since the current DAG is 3.27GB for ETH or 3.34GB for ETC.
RedPandaMining recently posted a video on his Youtube Channel.
https://www.youtube.com/watch?v=xRIX5mpVntk




It would be awesome if it worked on 3gb Nvidia cards, but from what I have seen its only a fix for AMD cards with 4gb and below running on windows. I setup a windows box with a GTX 1070 and a couple gtx 3gb 1060s with no luck, then I tried a mixed mode setup with an 8gb AMD card as the main GPU with no luck as well. I figured it would not work with Nvidia cards below 3 gb, but I wanted to try it out for kicks. If anyone else tried and had luck let me know.

your discussion is seriously weird. it is impossible to load >3gb array into <3 GPU memory whatever tricks you may perform.

DAG  - directed acyclic graph

"The Ethash algorithm expects the DAG as a two-dimensional array of uint32s (4-byte unsigned ints), with dimension (n × 16) where n is a large number. (n starts at 16777186 and grows from there.) Following the magic number, the rows of the DAG should be written sequentially into the file, with no delimiter between rows and each unint32 encoded in little-endian format."

"...calculating the PoW (Proof of Work) requires subsets of a fixed resource dependent on the nonce and block header. This resource (a few gigabyte size data) is called a DAG. The DAG is totally different every 30000 blocks (a 100 hour window, called an epoch) and takes a while to generate."


If you check out the comment I was responding to it mentioned that they are able to get 2 gb AMD cards to work provided they have one card in the mining rig with 8gb for the dag to populate on. I took them for their word and tried it with Nvidia but apparently it only works with AMD cards. I suppose I could find a 2gb AMD card and mix it with a 8gb card and see if what they say is true, but I do not really see what they would have to gain from making something like that up.

 
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October 28, 2019, 08:56:49 PM
 #3902

2Gb,4Gb DAG fix, need atleast 1 GPU large enough to generate DAG.

Recently realized in my farm that my 470 4Gb rigs, which were all 6 card setups at the time, were not generating the dag any longer for ETC and then soon after ETH dag approached whatever level it was that pushed my system over the limit. After a day of wondering what to do, I realized a 470 rig I have with 1 8Gb 580 in it was working fine with the other 5 cards being 470 4Gbs. I took apart one of my 580 8Gb rigs and replaced a card on one of the 470 rigs. Mined perfectly fine. Did this to the whole farm and split the gpus essentially so every 4Gb rig has atleast 1 8Gb card in it. As for now this works no issues. I have a p104-100 rig with 1 470 4Gb in it and same thing, generated dag and mines.

I tested this on 2Gb R7 200 gpus and works perfectly fine. Card generates the dag as long as the system has one available card that is able to fit the dag on it. This is identical to how the 470 rigs are operating.

The same goes for 470 4Gbs with rx 5700s and the same with the R7 200s with the rx 5700s.

It sounds like 4GB isn't enough for the DAG since the current DAG is 3.27GB for ETH or 3.34GB for ETC.
RedPandaMining recently posted a video on his Youtube Channel.
https://www.youtube.com/watch?v=xRIX5mpVntk





Just fyi i'm alec22ross or AKA https://www.bittapfinancial.com. That is me you are quoting. Hope you are not acting like you wrote that about your farm since you copied it word for word from my reddit post.

https://www.reddit.com/r/gpumining/comments/d9csi9/2gb4gb_dag_fix_need_atleast_1_gpu_large_enough_to/
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October 29, 2019, 09:42:50 AM
 #3903

2Gb,4Gb DAG fix, need atleast 1 GPU large enough to generate DAG.

Recently realized in my farm that my 470 4Gb rigs, which were all 6 card setups at the time, were not generating the dag any longer for ETC and then soon after ETH dag approached whatever level it was that pushed my system over the limit. After a day of wondering what to do, I realized a 470 rig I have with 1 8Gb 580 in it was working fine with the other 5 cards being 470 4Gbs. I took apart one of my 580 8Gb rigs and replaced a card on one of the 470 rigs. Mined perfectly fine. Did this to the whole farm and split the gpus essentially so every 4Gb rig has atleast 1 8Gb card in it. As for now this works no issues. I have a p104-100 rig with 1 470 4Gb in it and same thing, generated dag and mines.

I tested this on 2Gb R7 200 gpus and works perfectly fine. Card generates the dag as long as the system has one available card that is able to fit the dag on it. This is identical to how the 470 rigs are operating.

The same goes for 470 4Gbs with rx 5700s and the same with the R7 200s with the rx 5700s.

It sounds like 4GB isn't enough for the DAG since the current DAG is 3.27GB for ETH or 3.34GB for ETC.
RedPandaMining recently posted a video on his Youtube Channel.
https://www.youtube.com/watch?v=xRIX5mpVntk




It would be awesome if it worked on 3gb Nvidia cards, but from what I have seen its only a fix for AMD cards with 4gb and below running on windows. I setup a windows box with a GTX 1070 and a couple gtx 3gb 1060s with no luck, then I tried a mixed mode setup with an 8gb AMD card as the main GPU with no luck as well. I figured it would not work with Nvidia cards below 3 gb, but I wanted to try it out for kicks. If anyone else tried and had luck let me know.

your discussion is seriously weird. it is impossible to load >3gb array into <3 GPU memory whatever tricks you may perform.

DAG  - directed acyclic graph

"The Ethash algorithm expects the DAG as a two-dimensional array of uint32s (4-byte unsigned ints), with dimension (n × 16) where n is a large number. (n starts at 16777186 and grows from there.) Following the magic number, the rows of the DAG should be written sequentially into the file, with no delimiter between rows and each unint32 encoded in little-endian format."

"...calculating the PoW (Proof of Work) requires subsets of a fixed resource dependent on the nonce and block header. This resource (a few gigabyte size data) is called a DAG. The DAG is totally different every 30000 blocks (a 100 hour window, called an epoch) and takes a while to generate."


If you check out the comment I was responding to it mentioned that they are able to get 2 gb AMD cards to work provided they have one card in the mining rig with 8gb for the dag to populate on. I took them for their word and tried it with Nvidia but apparently it only works with AMD cards. I suppose I could find a 2gb AMD card and mix it with a 8gb card and see if what they say is true, but I do not really see what they would have to gain from making something like that up.

cannot tell you anything about "what they would have to gain" but that's really not that critical. it all sounds like confusing horseshit starting from "realization" of 4gb gpus "not generating the dag any longer"

@Bittap So you are saying that it's you who started this crazy claim... cool. Care to elaborate on the details? maybe screenshoots of 2gb gpu hashing eth? lol.

 
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October 29, 2019, 01:15:51 PM
Last edit: October 29, 2019, 01:45:39 PM by Bittap
 #3904

2Gb,4Gb DAG fix, need atleast 1 GPU large enough to generate DAG.

Recently realized in my farm that my 470 4Gb rigs, which were all 6 card setups at the time, were not generating the dag any longer for ETC and then soon after ETH dag approached whatever level it was that pushed my system over the limit. After a day of wondering what to do, I realized a 470 rig I have with 1 8Gb 580 in it was working fine with the other 5 cards being 470 4Gbs. I took apart one of my 580 8Gb rigs and replaced a card on one of the 470 rigs. Mined perfectly fine. Did this to the whole farm and split the gpus essentially so every 4Gb rig has atleast 1 8Gb card in it. As for now this works no issues. I have a p104-100 rig with 1 470 4Gb in it and same thing, generated dag and mines.

I tested this on 2Gb R7 200 gpus and works perfectly fine. Card generates the dag as long as the system has one available card that is able to fit the dag on it. This is identical to how the 470 rigs are operating.

The same goes for 470 4Gbs with rx 5700s and the same with the R7 200s with the rx 5700s.

It sounds like 4GB isn't enough for the DAG since the current DAG is 3.27GB for ETH or 3.34GB for ETC.
RedPandaMining recently posted a video on his Youtube Channel.
https://www.youtube.com/watch?v=xRIX5mpVntk




It would be awesome if it worked on 3gb Nvidia cards, but from what I have seen its only a fix for AMD cards with 4gb and below running on windows. I setup a windows box with a GTX 1070 and a couple gtx 3gb 1060s with no luck, then I tried a mixed mode setup with an 8gb AMD card as the main GPU with no luck as well. I figured it would not work with Nvidia cards below 3 gb, but I wanted to try it out for kicks. If anyone else tried and had luck let me know.

your discussion is seriously weird. it is impossible to load >3gb array into <3 GPU memory whatever tricks you may perform.

DAG  - directed acyclic graph

"The Ethash algorithm expects the DAG as a two-dimensional array of uint32s (4-byte unsigned ints), with dimension (n × 16) where n is a large number. (n starts at 16777186 and grows from there.) Following the magic number, the rows of the DAG should be written sequentially into the file, with no delimiter between rows and each unint32 encoded in little-endian format."

"...calculating the PoW (Proof of Work) requires subsets of a fixed resource dependent on the nonce and block header. This resource (a few gigabyte size data) is called a DAG. The DAG is totally different every 30000 blocks (a 100 hour window, called an epoch) and takes a while to generate."


If you check out the comment I was responding to it mentioned that they are able to get 2 gb AMD cards to work provided they have one card in the mining rig with 8gb for the dag to populate on. I took them for their word and tried it with Nvidia but apparently it only works with AMD cards. I suppose I could find a 2gb AMD card and mix it with a 8gb card and see if what they say is true, but I do not really see what they would have to gain from making something like that up.

cannot tell you anything about "what they would have to gain" but that's really not that critical. it all sounds like confusing horseshit starting from "realization" of 4gb gpus "not generating the dag any longer"

@Bittap So you are saying that it's you who started this crazy claim... cool. Care to elaborate on the details? maybe screenshoots of 2gb gpu hashing eth? lol.


Yea it was me. I'm sorry about how unorganized or legitimate it may seem. Its mostly a realization after Claymore 14.7 hit 299 and my 4gb Polaris cards started having dag issues. I tried each of my 4gb rigs with a 580 8gb thrown in and it started working. Back in April I built a desktop build with a r7 200 2gb and a 570 8gb for my self. It no longer exists because I dismantled it after 2 months. Now I cant get the r7 200 to work the way it did again. I'm still troubleshooting on my free time see if I can replicate the results. I want to show it off. I feel stupid saying it worked and no proof. But the build was a Msi z270a with a Kaby Celeron and 8gb of ram. Windows was installed in Legacy mode. I found that be crucial. UEFI mode is better for newer boards, pcie accessories, and mining but I I was forced to use legacy because the 570s did not like working together with the r7 200 in UEFI. It worked like a charm in Legacy. The r7 took about 50 seconds to load the dag and it gave a PITIFUL 1.2mhs. But it worked. As much hate as I'm getting over this I'm trying to replicate the results with my little free time. When I do I will be posting on Reddit and here with screen shots. Hope this helps clear a little confusion. Cheers.
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October 29, 2019, 02:26:33 PM
Last edit: October 29, 2019, 02:39:29 PM by Ursul0
 #3905

2Gb,4Gb DAG fix, need atleast 1 GPU large enough to generate DAG.

Recently realized in my farm that my 470 4Gb rigs, which were all 6 card setups at the time, were not generating the dag any longer for ETC and then soon after ETH dag approached whatever level it was that pushed my system over the limit. After a day of wondering what to do, I realized a 470 rig I have with 1 8Gb 580 in it was working fine with the other 5 cards being 470 4Gbs. I took apart one of my 580 8Gb rigs and replaced a card on one of the 470 rigs. Mined perfectly fine. Did this to the whole farm and split the gpus essentially so every 4Gb rig has atleast 1 8Gb card in it. As for now this works no issues. I have a p104-100 rig with 1 470 4Gb in it and same thing, generated dag and mines.

I tested this on 2Gb R7 200 gpus and works perfectly fine. Card generates the dag as long as the system has one available card that is able to fit the dag on it. This is identical to how the 470 rigs are operating.

The same goes for 470 4Gbs with rx 5700s and the same with the R7 200s with the rx 5700s.

It sounds like 4GB isn't enough for the DAG since the current DAG is 3.27GB for ETH or 3.34GB for ETC.
RedPandaMining recently posted a video on his Youtube Channel.
https://www.youtube.com/watch?v=xRIX5mpVntk




It would be awesome if it worked on 3gb Nvidia cards, but from what I have seen its only a fix for AMD cards with 4gb and below running on windows. I setup a windows box with a GTX 1070 and a couple gtx 3gb 1060s with no luck, then I tried a mixed mode setup with an 8gb AMD card as the main GPU with no luck as well. I figured it would not work with Nvidia cards below 3 gb, but I wanted to try it out for kicks. If anyone else tried and had luck let me know.

your discussion is seriously weird. it is impossible to load >3gb array into <3 GPU memory whatever tricks you may perform.

DAG  - directed acyclic graph

"The Ethash algorithm expects the DAG as a two-dimensional array of uint32s (4-byte unsigned ints), with dimension (n × 16) where n is a large number. (n starts at 16777186 and grows from there.) Following the magic number, the rows of the DAG should be written sequentially into the file, with no delimiter between rows and each unint32 encoded in little-endian format."

"...calculating the PoW (Proof of Work) requires subsets of a fixed resource dependent on the nonce and block header. This resource (a few gigabyte size data) is called a DAG. The DAG is totally different every 30000 blocks (a 100 hour window, called an epoch) and takes a while to generate."


If you check out the comment I was responding to it mentioned that they are able to get 2 gb AMD cards to work provided they have one card in the mining rig with 8gb for the dag to populate on. I took them for their word and tried it with Nvidia but apparently it only works with AMD cards. I suppose I could find a 2gb AMD card and mix it with a 8gb card and see if what they say is true, but I do not really see what they would have to gain from making something like that up.

cannot tell you anything about "what they would have to gain" but that's really not that critical. it all sounds like confusing horseshit starting from "realization" of 4gb gpus "not generating the dag any longer"

@Bittap So you are saying that it's you who started this crazy claim... cool. Care to elaborate on the details? maybe screenshoots of 2gb gpu hashing eth? lol.


Yea it was me. I'm sorry about how unorganized or legitimate it may seem. Its mostly a realization after Claymore 14.7 hit 299 and my 4gb Polaris cards started having dag issues. I tried each of my 4gb rigs with a 580 8gb thrown in and it started working. Back in April I built a desktop build with a r7 200 2gb and a 570 8gb for my self. It no longer exists because I dismantled it after 2 months. Now I cant get the r7 200 to work the way it did again. I'm still troubleshooting on my free time see if I can replicate the results. I want to show it off. I feel stupid saying it worked and no proof. But the build was a Msi z270a with a Kaby Celeron and 8gb of ram. Windows was installed in Legacy mode. I found that be crucial. UEFI mode is better for newer boards, pcie accessories, and mining but I I was forced to use legacy because the 570s did not like working together with the r7 200 in UEFI. It worked like a charm in Legacy. The r7 took about 50 seconds to load the dag and it gave a PITIFUL 1.2mhs. But it worked. As much hate as I'm getting over this I'm trying to replicate the results with my little free time. When I do I will be posting on Reddit and here with screen shots. Hope this helps clear a little confusion. Cheers.

Look... you are obviously wrong in your claim that one can mine eth and etc with less than 4gb gpus as the dag wont fit. also there is no problem with 4 gb gpus. not with loading nor dag generation. I have 370 here but I wont bother "testing" as its pointless, I know it wont work. You can even disregard everything and just think of the alternative implications of the stupidity of everyone else involved and you'll doubt yourself.
And in regard to the specifics of miner implementations (and lack of support for high epoh dags) maybe it has to do with eth promise to switch to pos ages ago and some hardcoded values or whatever. I have no idea. Its totally different story anyways.

EDIT: and because I'm lazy I still have PhoenixMiner 4.2c running on most of my 4GB polaris rigs, although I'm getting close to the edge of my disk space as they want over 35GB shared memory for 12 GPUs... (asrock h110 pro btc, 12gpus, win10 anniversary, 64gb ssd, celeron, 8gb ram)

 
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October 29, 2019, 03:05:26 PM
 #3906

Yea I hear ya. Im not going to back down though. It worked with a 2gb and I am trying to replicate the results again. You may be a long time member but I have been mining since 2016 also and have worked with hardware directly since 2010. Not just posting to get any attention, could really care less because who the hell is going to use a 1.2mhs capable card? I have 24 5700s on top of my 24 p104s and polaris 470s. Not too worried about proving the point except that I was able to do it.

Ofcourse I expected to be called an idiot and told I'm wrong. You should try it your self too if you care enough. Hopefully I can replicate my results but the dag in April was way above 3gb so there is definitely something to be proven here. I will try on some other daggerhash coins that have lower dags but above 2gb but not approaching 4gb like Music or Pirl. Once I have results you will see what im talking about. I'm lazy too and spend my life at data centers 50 hours a week 8pm-6am. But ill get something to show soon.
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October 29, 2019, 03:15:22 PM
 #3907

Also plenty of people with 4gb polaris cards are hitting dag limits. Im one of them. My 6 card rigs have been online for years until now. Issue started around dag 285 on ETC. ETH gave the same issues but later because the dag is slightly behind. I run windows 10 with Claymore connected to Nicehash dagger/hash pools. Virtual mem is set to 98gb. When the rigs were being fed ETH jobs they would mine no issue but as soon as the pool would switch to ETC it could not load the dag and would sit restarting the miner until Nicehash would switch back to ETH or whatever dagger/hash coin they are pushing. Did a couple Windows 10 reinstalls just to be sure I wasn't having any corruption or OS issues.
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October 29, 2019, 06:39:02 PM
Last edit: October 29, 2019, 06:55:07 PM by Ursul0
 #3908

Also plenty of people with 4gb polaris cards are hitting dag limits. Im one of them. My 6 card rigs have been online for years until now. Issue started around dag 285 on ETC. ETH gave the same issues but later because the dag is slightly behind. I run windows 10 with Claymore connected to Nicehash dagger/hash pools. Virtual mem is set to 98gb. When the rigs were being fed ETH jobs they would mine no issue but as soon as the pool would switch to ETC it could not load the dag and would sit restarting the miner until Nicehash would switch back to ETH or whatever dagger/hash coin they are pushing. Did a couple Windows 10 reinstalls just to be sure I wasn't having any corruption or OS issues.
the case you describe here: dag is being generated - it gets written into the GPU memory, but then you may need do free up all the memory to allocate another(different) DAG. there're many factors that can fail -  intensive mem writes on overclocked and already heated GPU,  memory free up and allocation can also fail easily, driver can be an issue and not only the miner app (like you may have no idea what kind of "optimizations" may be in the implementation of OpenCL methods on AMD side and how graceful it's with allocations these days or whatever)... so...

it all however doesn't mean that you can mine eth on 2gb gpus - it's total nonsense. very simple: you need DAG(over 2 GB size) for algo to work, if somehow you manage to slice it and put only "relevant"(Huh) parts of the dag to the current calculations - you'll kill all possibilities of producing any meaningful results by constantly bottlenecking around reloading the dag parts into memory.

in any case you are highly welcome to substantiate your incredible claims.

 
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October 29, 2019, 06:57:55 PM
 #3909

Also plenty of people with 4gb polaris cards are hitting dag limits. Im one of them. My 6 card rigs have been online for years until now. Issue started around dag 285 on ETC. ETH gave the same issues but later because the dag is slightly behind. I run windows 10 with Claymore connected to Nicehash dagger/hash pools. Virtual mem is set to 98gb. When the rigs were being fed ETH jobs they would mine no issue but as soon as the pool would switch to ETC it could not load the dag and would sit restarting the miner until Nicehash would switch back to ETH or whatever dagger/hash coin they are pushing. Did a couple Windows 10 reinstalls just to be sure I wasn't having any corruption or OS issues.
the case you describe here: dag is being generated - it gets written into the GPU memory, but then you need do free up all the memory to allocate another(different) DAG. there're many factors that can fail -  intensive mem writes on overclocked and already heated GPU,  memory free up and allocation can also fail easily, driver can be an issue and not only the miner app... so...

it all however doesn't mean that you can mine eth on 2gb gpus - it's total nonsense. very simple: you need DAG(over 2 GB size) for algo to work, if somehow you manage to do segmentation and put only "relevant"(Huh) parts of the dag to the current calculations - you'll kill all possibilities of producing any meaningful results by constantly bottlenecking around reloading the dag parts into memory.

in any case you are highly welcome to substantiate your incredible claims.

Look I get it. But it worked, in April, with the dag being over 2gb. It's quite possible that last bit of what you stated is what was going on. Card gave a very low hashrate, about 1.2mhs. I had set some settings in the bios I cant recall them except Legacy when installing the OS. Still working to figure out what I had done in April. 
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October 29, 2019, 11:47:58 PM
Merited by pbfarmer (1)
 #3910

Also plenty of people with 4gb polaris cards are hitting dag limits. Im one of them. My 6 card rigs have been online for years until now. Issue started around dag 285 on ETC. ETH gave the same issues but later because the dag is slightly behind. I run windows 10 with Claymore connected to Nicehash dagger/hash pools. Virtual mem is set to 98gb. When the rigs were being fed ETH jobs they would mine no issue but as soon as the pool would switch to ETC it could not load the dag and would sit restarting the miner until Nicehash would switch back to ETH or whatever dagger/hash coin they are pushing. Did a couple Windows 10 reinstalls just to be sure I wasn't having any corruption or OS issues.
the case you describe here: dag is being generated - it gets written into the GPU memory, but then you need do free up all the memory to allocate another(different) DAG. there're many factors that can fail -  intensive mem writes on overclocked and already heated GPU,  memory free up and allocation can also fail easily, driver can be an issue and not only the miner app... so...

it all however doesn't mean that you can mine eth on 2gb gpus - it's total nonsense. very simple: you need DAG(over 2 GB size) for algo to work, if somehow you manage to do segmentation and put only "relevant"(Huh) parts of the dag to the current calculations - you'll kill all possibilities of producing any meaningful results by constantly bottlenecking around reloading the dag parts into memory.

in any case you are highly welcome to substantiate your incredible claims.

Look I get it. But it worked, in April, with the dag being over 2gb. It's quite possible that last bit of what you stated is what was going on. Card gave a very low hashrate, about 1.2mhs. I had set some settings in the bios I cant recall them except Legacy when installing the OS. Still working to figure out what I had done in April. 

The following happened: the gpu(s) share the virtual mem address space with the host. Gpus already support using host-side mapped memory. Your allocation(s) were split across gpu mem pages and host mem pages by the driver. Many of your reads from the gpu was actually performed over PCIe, returning data from host mem. This is the cause of your crap hashrate.

Normally you see this behavior when you’re juuuust pushing past the 4GB or 8GB limit, ie the full vram capacity on the gpu. The driver still allows the allocation but part(s) of the buffer will hit host side mem over PCIe, not proper gpu vram. I’ve seen it a ton of times in CN mining when you push the nr allocated pads too hard. Seeing the driver allocating 60% of the DAG off-gpu is very surprising, but assuming you’re not BSing, that is what happened. Still won’t produce any useful hashrates so not really useful in the end anyway.
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October 30, 2019, 08:40:28 AM
Last edit: October 31, 2019, 07:57:11 AM by 2h4u
 #3911

@PhoenixMiner

4.7c leaking memory under Ubuntu Bionic. Huge leakage like 2Gb per day.

htop as follows: https://prnt.sc/pq0qpl. Note the old zombie threads.

p.s. Ran into the same issue on a previous Phoenix version
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October 30, 2019, 02:07:50 PM
 #3912

Also plenty of people with 4gb polaris cards are hitting dag limits. Im one of them. My 6 card rigs have been online for years until now. Issue started around dag 285 on ETC. ETH gave the same issues but later because the dag is slightly behind. I run windows 10 with Claymore connected to Nicehash dagger/hash pools. Virtual mem is set to 98gb. When the rigs were being fed ETH jobs they would mine no issue but as soon as the pool would switch to ETC it could not load the dag and would sit restarting the miner until Nicehash would switch back to ETH or whatever dagger/hash coin they are pushing. Did a couple Windows 10 reinstalls just to be sure I wasn't having any corruption or OS issues.
the case you describe here: dag is being generated - it gets written into the GPU memory, but then you need do free up all the memory to allocate another(different) DAG. there're many factors that can fail -  intensive mem writes on overclocked and already heated GPU,  memory free up and allocation can also fail easily, driver can be an issue and not only the miner app... so...

it all however doesn't mean that you can mine eth on 2gb gpus - it's total nonsense. very simple: you need DAG(over 2 GB size) for algo to work, if somehow you manage to do segmentation and put only "relevant"(Huh) parts of the dag to the current calculations - you'll kill all possibilities of producing any meaningful results by constantly bottlenecking around reloading the dag parts into memory.

in any case you are highly welcome to substantiate your incredible claims.

Look I get it. But it worked, in April, with the dag being over 2gb. It's quite possible that last bit of what you stated is what was going on. Card gave a very low hashrate, about 1.2mhs. I had set some settings in the bios I cant recall them except Legacy when installing the OS. Still working to figure out what I had done in April. 

The following happened: the gpu(s) share the virtual mem address space with the host. Gpus already support using host-side mapped memory. Your allocation(s) were split across gpu mem pages and host mem pages by the driver. Many of your reads from the gpu was actually performed over PCIe, returning data from host mem. This is the cause of your crap hashrate.

Normally you see this behavior when you’re juuuust pushing past the 4GB or 8GB limit, ie the full vram capacity on the gpu. The driver still allows the allocation but part(s) of the buffer will hit host side mem over PCIe, not proper gpu vram. I’ve seen it a ton of times in CN mining when you push the nr allocated pads too hard. Seeing the driver allocating 60% of the DAG off-gpu is very surprising, but assuming you’re not BSing, that is what happened. Still won’t produce any useful hashrates so not really useful in the end anyway.

Sounds like a very probable explanation which is why it may not be working now since we are beyond the dag level I had found it working on. 1.2mhs is obviously pittiful so the concept and idea is more what I was bringing to the table. Appreciate the explanation and thorough response. 
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October 30, 2019, 08:25:24 PM
 #3913

Hi,
Sorry for the bad English.
I am using 12x P106-090 Manli brand. (6GB 192 Bit Samsung GDDR5 Memory With 5SM GPU)
The Manli website states that it is 21-22MH / s, but I can't exceed 16MH / s with Windows 1903 and HiveOS, and if I overclock, my speed doesn't increase above 16.5MHs. I have tried the most up-to-date nVidia 430.50 WHQL and Manli with the original stock driver. I downloaded P106-100 REV 1 driver from Gigabyte and the problem persisted. I completely uninstalled the drives with DDU, tried with Phoenixminers 4.7c and old version.
disabled driver signatures. Where's the problem? Please help me and thank you very much.
You can try again with 1803 and new driver ( From WU )  and Nicehash, it should mine as they stated. Or go with 18.03 and an old  driver ( from ASUS P106 support ) and PM4.7c (on ethash or other pools). These 2 are only that worked for me ( tho p106-100 cards Gigabyte and asus ) Last Nicehash don't reckon cards with old driver...
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October 31, 2019, 10:37:19 PM
 #3914

Has anyone been able to get any further stability at 60mhs with Rx5700's? I haven't tried in a few weeks.
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November 01, 2019, 07:51:44 PM
 #3915

Has anyone been able to get any further stability at 60mhs with Rx5700's? I haven't tried in a few weeks.

Do you mean 60mh/s with -opencllocalwork setting?
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November 02, 2019, 01:48:37 PM
 #3916

hello dev PM when you come with update fix for GTX1050 TI 4GB Claymore 15 cannot allocate Dag?Huh?
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November 02, 2019, 01:50:51 PM
 #3917

I got this error
2019.10.24:07:22:23.857: main CUDA version: 10.0, CUDA runtime: 8.0
2019.10.24:07:22:23.986: main No OpenCL platforms found
2019.10.24:07:22:23.986: main Available GPUs for mining:
2019.10.24:07:22:23.986: main GPU1: P106-100 (pcie 1), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU2: P106-100 (pcie 2), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU3: P106-100 (pcie 3), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU4: P106-100 (pcie 5), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU5: P106-100 (pcie 6), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU6: P106-100 (pcie 7), CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.986: main GPU7: P106-100 (pcie Cool, CUDA cap. 6.1, 5.9 GB VRAM, 10 CUs
2019.10.24:07:22:23.998: main NVML library initialized
2019.10.24:07:22:24.104: main Nvidia driver version: 431.60
2019.10.24:07:22:24.106: main NVAPI error in NvapiWrapper.c:101 : -6
2019.10.24:07:22:24.106: main Unable to load NvAPI: error 3
2019.10.24:07:22:24.606: main Eth: the pool list contains 2 pools (2 from command-line)
2019.10.24:07:22:24.606: main Eth: primary pool: ssl://eu1.ethermine.org:5555
2019.10.24:07:22:24.606: main Starting GPU mining
2019.10.24:07:22:24.606: main GPU1: unable to init NvAPI with bus ID 65536
2019.10.24:07:22:24.607: main GPU2: unable to init NvAPI with bus ID 131072
2019.10.24:07:22:24.607: main GPU3: unable to init NvAPI with bus ID 196608
2019.10.24:07:22:24.607: main GPU4: unable to init NvAPI with bus ID 327680
2019.10.24:07:22:24.607: main GPU5: unable to init NvAPI with bus ID 393216
2019.10.24:07:22:24.607: main GPU6: unable to init NvAPI with bus ID 458752
2019.10.24:07:22:24.607: main GPU7: unable to init NvAPI with bus ID 524288
2019.10.24:07:22:24.752: wdog Starting watchdog thread



and PM dev please a update for this error
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November 02, 2019, 01:58:31 PM
 #3918

"CUDA error - cannot allocate big buffer for DAG. check readme.txt for possible solutions."
"GPU X failed"
"GPU X, CUDA error 11 - cannot write buffer for DAG"

Reinstalling the drive did not helped.
Win10 64bit 1903. 4GB RAM. 32GB Virtual Ram. Phoenixminer v4.7C
Please advice, Thank you.
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November 02, 2019, 09:08:40 PM
 #3919

P106 Hashrate drop with PhoenixMiner

Hi,
Sorry for the bad English.
I am using 12x P106-090 Manli brand. (6GB 192 Bit Samsung GDDR5 Memory With 5SM GPU)
The Manli website states that it is 21-22MH / s, but I can't exceed 16MH / s with Windows 1903 and HiveOS, and if I overclock, my speed doesn't increase above 16.5MHs. I have tried the most up-to-date nVidia 430.50 WHQL and Manli with the original stock driver. I downloaded P106-100 REV 1 driver from Gigabyte and the problem persisted. I completely uninstalled the drives with DDU, tried with Phoenixminers 4.7c and old version.
disabled driver signatures. Where's the problem? Please help me and thank you very much.
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November 03, 2019, 12:25:12 AM
 #3920

P106 Hashrate drop with PhoenixMiner

Hi,
Sorry for the bad English.
I am using 12x P106-090 Manli brand. (6GB 192 Bit Samsung GDDR5 Memory With 5SM GPU)
The Manli website states that it is 21-22MH / s, but I can't exceed 16MH / s with Windows 1903 and HiveOS, and if I overclock, my speed doesn't increase above 16.5MHs. I have tried the most up-to-date nVidia 430.50 WHQL and Manli with the original stock driver. I downloaded P106-100 REV 1 driver from Gigabyte and the problem persisted. I completely uninstalled the drives with DDU, tried with Phoenixminers 4.7c and old version.
disabled driver signatures. Where's the problem? Please help me and thank you very much.

Problem is in your cards. The P106-90s has lower hashrate with ETH DAG of actual size.
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