bathrobehero
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ICO? Not even once.
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November 28, 2015, 03:09:02 AM |
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I'm preaching to the choir once again but there are no magical 38 watt 750 cards exist, period. Even the non-Ti 750 cards can pull up to 60 watts with the stock BIOS regardless of having a 6 pin or not. That of course doesn't mean they will use 60 watt with every algo but they will use close to that much with more power hungry algos (eg. groestl).
Look into their BIOS' or any reliable reviews/stress tests or better yet, look at the wall with a watt meter.
There are no huge efficiency gaps (hash per watt) within Maxwell cards.
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Not your keys, not your coins!
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scryptr
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November 28, 2015, 04:31:21 AM |
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can you flash 750 non ti to 750 ti and what do you change
NO YOU CAN'T-- The 750 has 512 CUDA cores and the 750ti has 640 CUDA cores. The number of CUDA cores is the basis for the processing capacity. It is a significant physical difference. --scryptr |
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chrysophylax
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--- ChainWorks Industries ---
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November 28, 2015, 05:48:30 AM |
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anyway - as for the overclocking side ... i think i will take wolfs advice and take another look into it next week week ... the next 3days for me is incredibly busy ...
Linux vs Windows, cuda 6.5 vs 7.5, x86 vs x86_64. Holy crap hasn't this been hashed and rehashed over and over again? From my experience mining on Windows or Linux produces the same hash rates everything else being equal. However, I have noticed that Windows hashing slows more due to other activity, in particular logging in remotely with ssh. I haven't tried cuda 7.5 on either OS but the hashrates you reported on cuda 7.5 is significantly slower that I get with 6.5 on Linux or Windows. I conclude 7.5 is equally slow on both OS's. 32 vs 64 bit is not about the OS but about how ccminer is compiled. Compiling for 32 bit tends to be a little more efficient when dealing with mostly 32 bit arithmetic. Overclocking on Linux has been discussed at length in this thread, including getting it to work headless. Search for "cooolbits" for everything you need to know. id like to say that i totally agree with you joblo - but i dont ... as the systems i have running are showing the complete opposite of what you are stating ... coolbits and oc are NOT working as they should on the gigabyte 750ti oc lp cards i have running ... investigation into this lead me to conclude that ( and i did read this on the nvidia site ) that the support is not currently implemented in the drivers ( cuda and video drivers ) as of yet - and is only available for the higher end cards ... the cuda 7.5 implementation i have compiling ccminer-spmod IS causing hashing as fast ( and slightly faster ) than cuda 6.5 compiles ... im not trying to be obnoxious - its a fact ... sp has these results of slower hashrate using c7.5 as you do - i dont ... go figure ... #crysx I know coolbits doesn't work. Flash your GPUs. I'm not willing to go as far as flashing FW but coolbits worked for me. Crysx, I don't think you are being obnoxious, just maybe a little stubborn. Your results are counter to others in two ways that are contradictory. First you say Cuda 7.5 is faster than 6.5, while it's the reverse for everyone else. But then your 7.5 hash rate (2800) is lower than others' 6.5 hash rate (3100). Putting both of those facts together and your 6.5 hash rate would be even lower than 2800. In order to accept your facts I would have to believe three things: 1. your particular 750ti's can't perform to the same level as any others, 2. for some unique reason you don't suffer the 10% loss in performance between 6.5 and 7.5 that anyone else experiences, 3. it's just a coincidence that your hash rates are lower by the same amount of degradation expected between 6.5 and 7.5. If it was happening to me and potentially costing me 300 KH per card I'd want to get to the bottom of it. that is what im saying joblo ... its not contradictory at all ... my cards did just below 2800KH on c6.5 compile on f20x64 - now they do a little over 2800KH on c7.5 compiled on f22x64 ... these cards NEVER did 3100KH on ANY of my systems ... period ... so contradictory to OTHERS or not - MY systems are doing this ... thats it ... i can allow YOU access to prove it mate - as i trust YOU ( and only a very few others on here ) if you would like to try and compile for yourself in MY systems ... i can allocate one machine and you can have a go ... THEN tell me how contradictory it is when you see the SAME results as i do ... my offer is open mate ... #crysx |
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joblo
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November 28, 2015, 04:07:09 PM
Last edit: November 28, 2015, 10:49:49 PM by joblo |
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In order to accept your facts I would have to believe three things:
1. your particular 750ti's can't perform to the same level as any others,
2. for some unique reason you don't suffer the 10% loss in performance between 6.5 and 7.5 that anyone else experiences,
3. it's just a coincidence that your hash rates are lower by the same amount of degradation expected between 6.5 and 7.5.
If it was happening to me and potentially costing me 300 KH per card I'd want to get to the bottom of it.
that is what im saying joblo ... its not contradictory at all ... my cards did just below 2800KH on c6.5 compile on f20x64 - now they do a little over 2800KH on c7.5 compiled on f22x64 ... these cards NEVER did 3100KH on ANY of my systems ... period ... so contradictory to OTHERS or not - MY systems are doing this ... thats it ... i can allow YOU access to prove it mate - as i trust YOU ( and only a very few others on here ) if you would like to try and compile for yourself in MY systems ... i can allocate one machine and you can have a go ... THEN tell me how contradictory it is when you see the SAME results as i do ... my offer is open mate ... #crysx Thanks for the offer but I wouldn't accept it unless it would help solve the dilema, not just to prove it. Also you're getting the expected performance of cuda 7.5 on a 750ti so there may be little for you to gain by pursuing this issue. I looked at the clock specs for the GB LP card and they are about 10% lower than my EVGAs so that can account for your lower baseline. With that variable eliminated it leads me to my real pet peeve, the lower performance with cuda 7.5 vs 6.5. It still baffles me that Nvidia would do this with apparently no effort to either fix it, provide a compatibility mode, or continue to support 6.5. I think I need to do some testing of cuda 7.5, maybre things are improving. EDIT: I have tested cuda 6.5 vs 7.5 on Centos 6.7, driver 352.63, with 2 EVGA GTX 750ti SC standard clocks, mining x11. Each card produces different hash rates: GPU0: 6.5 3085 7.5 3015 GPU 1: 6.5 3155 7.5 3090 Cuda 7.5 deficit is still about 70k, about 2%. |
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Cryptozillah
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November 29, 2015, 06:00:35 AM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
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chrysophylax
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Activity: 2828
Merit: 1091
--- ChainWorks Industries ---
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November 29, 2015, 07:16:42 AM |
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In order to accept your facts I would have to believe three things:
1. your particular 750ti's can't perform to the same level as any others,
2. for some unique reason you don't suffer the 10% loss in performance between 6.5 and 7.5 that anyone else experiences,
3. it's just a coincidence that your hash rates are lower by the same amount of degradation expected between 6.5 and 7.5.
If it was happening to me and potentially costing me 300 KH per card I'd want to get to the bottom of it.
that is what im saying joblo ... its not contradictory at all ... my cards did just below 2800KH on c6.5 compile on f20x64 - now they do a little over 2800KH on c7.5 compiled on f22x64 ... these cards NEVER did 3100KH on ANY of my systems ... period ... so contradictory to OTHERS or not - MY systems are doing this ... thats it ... i can allow YOU access to prove it mate - as i trust YOU ( and only a very few others on here ) if you would like to try and compile for yourself in MY systems ... i can allocate one machine and you can have a go ... THEN tell me how contradictory it is when you see the SAME results as i do ... my offer is open mate ... #crysx Thanks for the offer but I wouldn't accept it unless it would help solve the dilema, not just to prove it. Also you're getting the expected performance of cuda 7.5 on a 750ti so there may be little for you to gain by pursuing this issue. I looked at the clock specs for the GB LP card and they are about 10% lower than my EVGAs so that can account for your lower baseline. With that variable eliminated it leads me to my real pet peeve, the lower performance with cuda 7.5 vs 6.5. It still baffles me that Nvidia would do this with apparently no effort to either fix it, provide a compatibility mode, or continue to support 6.5. I think I need to do some testing of cuda 7.5, maybre things are improving. EDIT: I have tested cuda 6.5 vs 7.5 on Centos 6.7, driver 352.63, with 2 EVGA GTX 750ti SC standard clocks, mining x11. Each card produces different hash rates: GPU0: 6.5 3085 7.5 3015 GPU 1: 6.5 3155 7.5 3090 Cuda 7.5 deficit is still about 70k, about 2%. see - that is very weird ... if you have a spare system - try fedora install with the same setting you are using with centos ... im baffled ... i know this much for sure - if i go back to a f20x64c6.5 system - it compiles and runs beautifully with no issues in compile ... the moment you go to f2x64c7.0 ( as you are forced to go to that version of cuda if you are using fedora 21 ) then hashrates are less than half that of c6.5 IF they work at all ... the update to f22x64c7.5 seems to be running as well and better than the f20x64c6.5 installation ... admittedly - its impossible for me to test f20x64c6.5 now as i dont have a spare machine to do the installation with - so there is no way of telling whether ccminer-spmod74 is actually running any better on f22x64c7.5 ... im stumped mate ... really ... you helped me a while back with a compilation issue ( if you remember ) that i had with the earlier version f19x64c6.5 and i have been very thankful since ... the idea that an upgrade like this can do the reverse of what most people are getting NEEDS to have the source of it located ... im actually quite upset that nvidia are leaving a lot of loose ends with their cuda implementations - unless off course you have the really high end cards ... it seems thats all they really care about at the moment ... in any case - i appreciate your time and effort ( once again with my issue ) ... #crysx |
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AzzAz
Legendary
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Activity: 1030
Merit: 1006
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November 29, 2015, 10:43:48 AM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
Put RAM anyway to test, but... I have 1 rig with similar problem. Did you try "Benchmark" in nicehash miner? Did it run all coins or terminated some? My rig has problems with some coins and if that is your case it might point to what the problem is |
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Cryptozillah
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November 29, 2015, 11:41:21 AM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
Put RAM anyway to test, but... I have 1 rig with similar problem. Did you try "Benchmark" in nicehash miner? Did it run all coins or terminated some? My rig has problems with some coins and if that is your case it might point to what the problem is I will test to add more ram later today and see if it help. I always benchmark all algos in the nicehash miner and i dont get any errors while doing that. |
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AzzAz
Legendary
Offline
Activity: 1030
Merit: 1006
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November 29, 2015, 01:42:27 PM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
Put RAM anyway to test, but... I have 1 rig with similar problem. Did you try "Benchmark" in nicehash miner? Did it run all coins or terminated some? My rig has problems with some coins and if that is your case it might point to what the problem is I will test to add more ram later today and see if it help. I always benchmark all algos in the nicehash miner and i dont get any errors while doing that. I have rig with 6 960 (4GB) that won't start with less than 8GB RAM, and another with 6 960 ( 2GB) that work with 4GB RAM. And rig with 3 980s that work perfectly with 4 GB RAM. And this 970x2 + 960 with problem with some algos ( neoscrypt, lyra2v2 and so-so with x13 (?) ) I suspect 2 unpowered risers might be a problem... Double check all connections! |
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Cryptozillah
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November 29, 2015, 02:49:56 PM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
Put RAM anyway to test, but... I have 1 rig with similar problem. Did you try "Benchmark" in nicehash miner? Did it run all coins or terminated some? My rig has problems with some coins and if that is your case it might point to what the problem is I will test to add more ram later today and see if it help. I always benchmark all algos in the nicehash miner and i dont get any errors while doing that. I have rig with 6 960 (4GB) that won't start with less than 8GB RAM, and another with 6 960 ( 2GB) that work with 4GB RAM. And rig with 3 980s that work perfectly with 4 GB RAM. And this 970x2 + 960 with problem with some algos ( neoscrypt, lyra2v2 and so-so with x13 (?) ) I suspect 2 unpowered risers might be a problem... Double check all connections! I just added another 4GB to this rig, i hope it will help. I have five rigs running in total but this one is the only troublemaker  If this dont help i will swap cards in two rigs and see what happends. |
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bathrobehero
Legendary
Offline
Activity: 2002
Merit: 1051
ICO? Not even once.
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November 29, 2015, 03:14:31 PM |
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I have some problem with my 2x980 rig i started up a few days ago.
I run Win 8.1 on it like the rest of my rigs and it is a clean install.
The rig is shutting itself down like 1-2 times per day. And when i fire it back up Windows tell me that the computer ran into some problems.
This occurs with or without oc on the cards, not sure wth is going on. It happends when mining with both sp mod and the nicehash miner.
I have a 1200w Silverstone strider psu in that rig so it is not a power problem.
I have 4Gb ram in this rig just like the rest of my rigs, but could it be that i need more ram with 980 cards ?
This is the first time i mine with 980s so i am kind of out of ideas here.
Put RAM anyway to test, but... I have 1 rig with similar problem. Did you try "Benchmark" in nicehash miner? Did it run all coins or terminated some? My rig has problems with some coins and if that is your case it might point to what the problem is I will test to add more ram later today and see if it help. I always benchmark all algos in the nicehash miner and i dont get any errors while doing that. I have rig with 6 960 (4GB) that won't start with less than 8GB RAM, and another with 6 960 ( 2GB) that work with 4GB RAM. And rig with 3 980s that work perfectly with 4 GB RAM. And this 970x2 + 960 with problem with some algos ( neoscrypt, lyra2v2 and so-so with x13 (?) ) I suspect 2 unpowered risers might be a problem... Double check all connections! I think adding more swapfile would be enough. I have 4GB RAM in my rigs but with 16GB swapfile which lets me run 4x970 + 2x750 Ti. The swapfile is never used (as it wouldn't use 8GB memory either) but it needs it momentarily. |
Not your keys, not your coins!
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Cryptozillah
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November 29, 2015, 03:32:54 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
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zTheWolfz
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November 29, 2015, 04:11:37 PM
Last edit: November 29, 2015, 04:22:24 PM by zTheWolfz |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". Get something to monitor temperatures and other resources: http://www.aida64.com/downloads works good for that. If its the miner then the swapfile may fix that.  |
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Cryptozillah
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November 29, 2015, 04:18:32 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. |
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zTheWolfz
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November 29, 2015, 04:24:49 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. |
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Cryptozillah
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November 29, 2015, 04:31:28 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. I will let it run now and see if it is working better now. If not i will start checking other stuff. I know this PSU is working perfectly, i have used all cables i use now in another rig before putting the 980s in it. |
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zTheWolfz
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November 29, 2015, 04:43:25 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. I will let it run now and see if it is working better now. If not i will start checking other stuff. I know this PSU is working perfectly, i have used all cables i use now in another rig before putting the 980s in it. Okay if you say so but things in a computer go bad in a blink of a eye. I've done tech support for a major Motherboard Co. for over 20 years. I've seen just about every type of a problem. Shut down is usually caused by heat, PSU or other faulty hardware. |
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Cryptozillah
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November 29, 2015, 04:55:00 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. I will let it run now and see if it is working better now. If not i will start checking other stuff. I know this PSU is working perfectly, i have used all cables i use now in another rig before putting the 980s in it. Okay if you say so but things in a computer go bad in a blink of a eye. I've done tech support for a major Motherboard Co. for over 20 years. I've seen just about every type of a problem. Shut down is usually caused by heat, PSU or other faulty hardware. Yeah i know. It is nothing going warm in this rig, it is standing next to a partly open window and i have been monitoring all the temps. I will do some more troubleshooting if it wont run without problems now. |
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zTheWolfz
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November 29, 2015, 05:09:03 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. I will let it run now and see if it is working better now. If not i will start checking other stuff. I know this PSU is working perfectly, i have used all cables i use now in another rig before putting the 980s in it. Okay if you say so but things in a computer go bad in a blink of a eye. I've done tech support for a major Motherboard Co. for over 20 years. I've seen just about every type of a problem. Shut down is usually caused by heat, PSU or other faulty hardware. Yeah i know. It is nothing going warm in this rig, it is standing next to a partly open window and i have been monitoring all the temps. I will do some more troubleshooting if it wont run without problems now. GPU's now days throttle when over heated so unless a software is telling it to shut down the system at a certain temp point. Then it wouldn't be that. The bios does have such a monitoring system for shut down of the motherboard if the MB or CPU crosses a certain point. PSU's today "some not all" also have this monitoring system of temps & voltage on each rail and will shut down the system. Good luck with the problem. Hope its fixed now. |
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joblo
Legendary
Offline
Activity: 1470
Merit: 1114
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November 29, 2015, 05:24:35 PM |
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I changed my swapfile from 8GB to 16Gb now on the problem rig, i hope it will run fine now.
I'm unsure if its the rig shutting down or the miner, but if its the rig I'd check for overheating problems "CPU or motherboard". If its the miner then the swapfile may fix that. I dont think it is the miner crashing, i am pretty sure it is the system shutting down. GPU temps are around 65 degrees during full load so it is not a heat problem. I now have 8GB ram in the rig and 16GB swap file, i will let it run unclocked now and see what happends. Could be something like weak rail "IE 12v, 3.3, 5v" on the PSU taking a dip under load tripping the PSU to shut down. I will let it run now and see if it is working better now. If not i will start checking other stuff. I know this PSU is working perfectly, i have used all cables i use now in another rig before putting the 980s in it. Okay if you say so but things in a computer go bad in a blink of a eye. I've done tech support for a major Motherboard Co. for over 20 years. I've seen just about every type of a problem. Shut down is usually caused by heat, PSU or other faulty hardware. Yeah i know. It is nothing going warm in this rig, it is standing next to a partly open window and i have been monitoring all the temps. I will do some more troubleshooting if it wont run without problems now. If the problem started immediately after instaling the 980s it's something related to that, possibly resource related, heat, power or the cards themselves. If it previously ran stable with the 980s it is more likely a HW failure. The nature of the shutdown might give a clue. If the system powers off it's likely a power issue. If it drops to BIOS it is likely some other protection tripping. If it reboots it's likely a simple HW fault or OS related. If you have consistently reproduceable symptoms you can start juggling things around to see if things change. Since you have other rigs available you can swap RAM, cables etc to try to move the symptoms, which would clearly identify the faulty component. |
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