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Author Topic: Bitmain launches the Z9 Equihash miner  (Read 36797 times)
yrk1957
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June 29, 2018, 11:29:31 PM
 #1381

Whoever is overclocking should be careful. These chips may not have same thermal limits as S9, which run easily even at 90C+. There is no way to tell what’s the limit, so as low as you are comfortable. Probably 70C+ is too much for it.
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June 30, 2018, 12:31:10 AM
 #1382

Just got mines yesterday. After seeing reports of everyone overclocking this I had it up to 700M mining at 14.8k and 79 degrees. After reading the last few pages on here, i have scaled back to 600M 12.3k at 68 degrees. Gonna play it safe for now.
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June 30, 2018, 01:40:15 AM
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 #1383

I found the perfect place to put my Z9. I have one of those hybrid electric water heaters that user a heat pump to heat the water. I mounted it on the intake. This room is pretty cold because the outlet on the water heater puts out really cold air.

Chip temps were getting up to 83C in my mining room as the mining room topped out at 108F today.

Once I mounted it in the cooler room clocked at 750mhz the temps are all 59-62C. Plus free heat to keep the water warm. The air coming out of the Z9 is not really that warm. Can't even be called hot. The only thing I am worried about is something leaking into the heat pump, but I don't think there is any thermal pads inside this thing to leak flux like some gpus.

When unplugged plenty of air get's into the water heater...

1   4   750   5.20   0   47   59   oooo
2   4   750   5.28   0   46   60   oooo
3   4   750   5.89   0   48   62   oooo


Longsnowsm
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June 30, 2018, 08:04:38 PM
 #1384

Screw Bitmain...this is how you get a 2 in 1 miner by yourself Cheesy

Might have some fun stuff for you guys soon (I figured out the voltage controller which is how I hit 800mhz stable btw).



Are you using a voltage app to adjust please educate!

Unfortunately no, trying to build a solution similar to my L3+ voltage app, but currently I had to hack into the voltage controller and control it externally via a Raspberry pi. This is what it looks like, and doubt most people will want to do this to their brand new units:



Seems like bitmain saw what I was doing with their L3's and they shut off the user space i2c interface which controls all this stuff, they also haven't release the firmware so I can't hack that to enable it. Either way even if I can get it working with the internal controller, you will still have to pull your boards and shunt two resistor pads to connect the voltage controller i2c lines, they also purposely set these lines disconnected so there is no possibility for normal users to change anything.

All this makes sense when you look at the hardware, they are running these way below half power of what they can output...so they REALLY don't want people to know this. These things are polaris sized dies ~200mm^2. Each of these dies can easily do 100 watts each with proper cooling (vs the stock 20 watts). This is definitely the most advanced ASIC bitmain has made, and you can see all the billions they are making is going into serious R&D.



Even their voltage controllers are in the "GPU" territory now. This is run by an advanced muti-phase regulator. This particular board has 6 phases, with only 4 phases used. Each phase has a 60amp capability, so total output of 240 amps. Stock voltage is set at 800mv so were talking 200 watts PER BOARD, with only 80 watts utilized. Im already order parts for the rest of the phases since I'm already running near the max with 20 KSols/s I'm running now. That will bump things up to over 300 watts and over 25KSols/s. These chips will definitely be running at 2KSols each in their big miner.



Thanks for the indepth view of what you are working on.  Keep us posted if you come up with something that "average" people could do to make this hack to the Z9's.  I am watching others overclock, but I am concerned about temps given my mining location is already hot.  So your mod gives me hope that this might be doable once you sort out the details.  Thanks again!
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June 30, 2018, 10:48:21 PM
 #1385

Any thoughts on the highest temp these z9's should reach?
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July 01, 2018, 10:35:29 AM
 #1386

These chips are more vulnerable to temperatures. I already talked before, that 70C is a lot for them. My Z9 is in stock of DHL since Friday (some bastards). The first thing I do is put a fan of the S9 at the exit. It has to lower temperatures even at 800mhz
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July 01, 2018, 11:55:59 AM
 #1387

These chips are more vulnerable to temperatures. I already talked before, that 70C is a lot for them. My Z9 is in stock of DHL since Friday (some bastards). The first thing I do is put a fan of the S9 at the exit. It has to lower temperatures even at 800mhz

How did you attached that fan? With screws?Please post a picture if you can.
whoismoses
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July 01, 2018, 01:32:52 PM
 #1388

Question about overclocking beyond the 750 mhz...

Is getting more options as simple as editing the file on the miner that is used to generate the web page?

I tried using my browsers developer tools, I added 775 and 800. Switched to 775 and it seems to have gotten slower.

Browser's developer tools = right click, inspect element, edit the html...
cod3gen
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July 01, 2018, 01:36:50 PM
 #1389

Question about overclocking beyond the 750 mhz...

Is getting more options as simple as editing the file on the miner that is used to generate the web page?

I tried using my browsers developer tools, I added 775 and 800. Switched to 775 and it seems to have gotten slower.

Browser's developer tools = right click, inspect element, edit the html...

You will have to finetune. OC too much and you start loosing hashrate. One of mine is tapped out @ 750 while another is tapped out @ 768. Any higher clocks will require higher voltage, which currently is not possible to achieve without special tools.

https://www.powermining.pw ⮚ Hit us with your power while mining for over 30 listed coinz in various algorithms! Get in touch on Discord: https://discord.gg/qSV6b9d
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July 01, 2018, 06:03:33 PM
 #1390

First post.  Thanks for this thread and your contributions everyone, been following it since I ordered my z9 mini very informative.  Thank you.
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July 01, 2018, 08:00:00 PM
 #1391

These chips are more vulnerable to temperatures. I already talked before, that 70C is a lot for them. My Z9 is in stock of DHL since Friday (some bastards). The first thing I do is put a fan of the S9 at the exit. It has to lower temperatures even at 800mhz

How did you attached that fan? With screws?Please post a picture if you can.

Also interested as I have some 120MM static pressure fans but have no idea how to attached them to the back of the z9 minis. Thanks in advance
OhHaiAndy
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July 02, 2018, 02:44:48 AM
 #1392

I'm not sure about everyone's apprehension with 70C+ temps. With 95F+ ambient temps and at stock speeds, my Z9 runs 73-76C with the fan set to auto. When I move the fan to 100%, the temp drops to 66-68C. When I move the unit up to 750Mhz and set the fan to auto, it runs close, but not completely at 100% with the same 73-76C temps. If I move the fan to 100% at 750Mhz, the temps stabilize around 71-73C.

The specified operating environment for the Z9 Mini is 0-40 ℃ (32-104F). So in an environment that falls within those specifications, the software is trying to keep my Z9 in the low to mid 70s. That tells me this is a fine temperature for the unit.
whoismoses
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July 02, 2018, 12:25:28 PM
 #1393

I'm not sure about everyone's apprehension with 70C+ temps.

I ran mine for a couple days in my 102-104F mining room. Clocked at 750mhz the temps were in the low 80C's. I've since moved it to sitting on top of my water heater with a heat pump (see my post above) just to reuse the heat to heat the water. Temps are now in the low 60C's, plus I get about 2000 extra Sols/s with the cooler temps.

I don't think anyone really knows what the correct chip temps are. There is a lot of talk these chips being more like GPUs or FPGAs. Most people try to keep their GPUs below 75C, but temps into the high 80C's are not really an issue. In case anyone asks, my temps of my gpus are 55C - 65C.
Eyedol-X
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July 02, 2018, 01:11:21 PM
 #1394

I'm not sure about everyone's apprehension with 70C+ temps. With 95F+ ambient temps and at stock speeds, my Z9 runs 73-76C with the fan set to auto. When I move the fan to 100%, the temp drops to 66-68C. When I move the unit up to 750Mhz and set the fan to auto, it runs close, but not completely at 100% with the same 73-76C temps. If I move the fan to 100% at 750Mhz, the temps stabilize around 71-73C.

The specified operating environment for the Z9 Mini is 0-40 ℃ (32-104F). So in an environment that falls within those specifications, the software is trying to keep my Z9 in the low to mid 70s. That tells me this is a fine temperature for the unit.

I ran mine for a couple days in my 102-104F mining room. Clocked at 750mhz the temps were in the low 80C's. I've since moved it to sitting on top of my water heater with a heat pump (see my post above) just to reuse the heat to heat the water. Temps are now in the low 60C's, plus I get about 2000 extra Sols/s with the cooler temps.

I don't think anyone really knows what the correct chip temps are. There is a lot of talk these chips being more like GPUs or FPGAs. Most people try to keep their GPUs below 75C, but temps into the high 80C's are not really an issue. In case anyone asks, my temps of my gpus are 55C - 65C.

I'll be interested to see how both of your are doing in the next couple of weeks. Most GPU's start throttling at 80C in terms of performance but who knows how these will hold up.

One person in this thread has reported theirs died inside within a couple of days of extreme overclocking but you hear that about every version of Bitmains miners, there are always a few that have immediate or near immediate failures.

I guess it could be argued how much more profitable the miner could be at 15-16 vs 12-13k vs power usage. at 575Mhz mine are running under 66C with fan set on auto and between 12.5-12.8K, haven't pulled power usage at this speed though.

The net result for ~3k additional hashrate is running the chips at 10-15C hotter and who knows what power usage... I'm wondering if its worth it if the miner dies in the short term (under 90 days).



whoismoses
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July 02, 2018, 03:53:30 PM
 #1395


I'll be interested to see how both of your are doing in the next couple of weeks. Most GPU's start throttling at 80C in terms of performance but who knows how these will hold up.


I've never actually got any of my GPUs to 80C, but like I said before @ 750mhz / 60-65C I got about 2000 Sols/s more than when I was @ 750mhz / 80-85C.


One person in this thread has reported theirs died inside within a couple of days of extreme overclocking but you hear that about every version of Bitmains miners, there are always a few that have immediate or near immediate failures.


I don't think he was doing anything extreme like increasing the voltage. I think he just ran it at 700mhz or 750mhz. It is likely there was something wrong with his miner or a heatsink was not attached properly.


I guess it could be argued how much more profitable the miner could be at 15-16 vs 12-13k vs power usage. at 575Mhz mine are running under 66C with fan set on auto and between 12.5-12.8K, haven't pulled power usage at this speed though.


Mine at stock speeds was only pulling 265 watts with a bronze 750 watt PSU. At 750mhz I'm pulling just over 300 watts.


The net result for ~3k additional hashrate is running the chips at 10-15C hotter and who knows what power usage... I'm wondering if its worth it if the miner dies in the short term (under 90 days).


I just want to break even on this thing. Making a profit after cost of machine + electricity would be great. Right now at today's network hash/diff and prices I'll break even in 75 days given what I have already mined.
boo50
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July 02, 2018, 03:57:25 PM
 #1396

if you guys want to mine some new and small coins (you know there are always more chances to grow for small coins), join us @ https://nibirupool.com
we've a lot of Z9 compatible pools - BTCP, ZEL,VOT,VIS,ACH,ZCL,ZEN,BCI.
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July 02, 2018, 04:32:46 PM
 #1397

https://minermonitoring.com Supports now Z9 monitoring over android/iphone remotely.
Longsnowsm
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July 02, 2018, 08:26:25 PM
 #1398

Anyone else had an issue where the Z9 mini fan starts cycling high like it is restarting and the red fault indicator is solid red?  Just had multiple Z9's go into this state at the same time.  I thought maybe is was something to do with the pool, but I tried changing the pool on one of them to see if that corrected it, but it goes back to the same state.  I am running stock clock speeds, so no overclocking or anything like that going on.  Tried power cycling them and that didn't correct it.  Any thoughts?
not.you
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July 02, 2018, 11:28:28 PM
 #1399

Anyone else had an issue where the Z9 mini fan starts cycling high like it is restarting and the red fault indicator is solid red?  Just had multiple Z9's go into this state at the same time.  I thought maybe is was something to do with the pool, but I tried changing the pool on one of them to see if that corrected it, but it goes back to the same state.  I am running stock clock speeds, so no overclocking or anything like that going on.  Tried power cycling them and that didn't correct it.  Any thoughts?

My first thought is that if multiple ones did it at the same time it's network related.  I think considering the pool is also a good suspect but it sounds like you have eliminated that.  Swap a switch or something.

EDIT: One thing that just occurred to me, verify that whatever they are using for DNS can resolve the pool(s) you have configured.  Maybe they can't find the pool.
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July 02, 2018, 11:29:51 PM
 #1400

Anyone else had an issue where the Z9 mini fan starts cycling high like it is restarting and the red fault indicator is solid red?  Just had multiple Z9's go into this state at the same time.  I thought maybe is was something to do with the pool, but I tried changing the pool on one of them to see if that corrected it, but it goes back to the same state.  I am running stock clock speeds, so no overclocking or anything like that going on.  Tried power cycling them and that didn't correct it.  Any thoughts?

My first thought is that if multiple ones did it at the same time it's network related.  I think considering the pool is also a good suspect but it sounds like you have eliminated that.  Swap a switch or something.

Agree, network related

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