Topic: Bitmain launches the Z9 Equihash miner - page 33. (Read 37201 times)

This is my stats. Chuggin along at about 14.8

1   4   700   4.28   0   51   66   oooo
2   4   700   5.52   0   51   64   oooo
3   4   700   4.99   0   54   68    oooo

hi i reduced my fan to 35% and i have dis temps:



Chain#   ASIC#   Frequency   KSol/S(RT)   HW   Temp(PCB)   Temp(Chip)   ASIC status
1             4               600   4.60                     0     59                    74   oooo
2             4               600   4.89                     0     58                   74   oooo
3             4               600   4.05                     0     60                    73   oooo

is to high?
Speed (r/min)   2,640

thanks.

The inductors look like eatons I've used. They look like FP1007R6-R15-R or FP1008-150-R, but the part marking is different and labelled 1449 (144nH). I haven't found a part that matches that yet.

No worries. I'm an EE too (microwave electronics, but have designed single phase bucks and boosts). I haven't opened mine up yet to build a schematic, though. Probably will do that this weekend.

Despite being in competition as miners and all... I'd be interested in getting that data if your're game

These miners haven't been around long enough to know what is too much for them but historically I have run bitmain BTC miners as hot as 103 as reported in the GUI without a problem.  I will point out that when I have seen them that high it is usually because the building cooling system is not working or functioning properly and I downclock when I see anything that extreme until the building HVAC issues are dealt with.  I regularly run my S9s in the 90's during summer though.

My highest temp on these Z9's so far is 74 in the afternoon.  I have it OC'd almost as high as it can stand, I found that slightly under the highest it can take provides a little better hashrate than the absolute highest.

Yes I design miners for a living Everything on here is way over specced...even at 45 amps I'm pushing though them now they are running a cool 70c without heatsinks. I have already dumped the config and modified it for 6 phases  

That equals what in HEX?

900mv

Anyone know the safe upper limit on temperature for the chips in these things? My mining room is 101F (38C) right now due to all the GPUs. I have my Z9 clocked at 700 and I am getting 15.3 KSol/s but my chips are 74C, 77C, & 78C. That ok? I'm sure bitmain doesn't post specs for this stuff, but most of the screenshots in this thread they are a little cooler. I'm wondering if anyone has this in a dedicated room / shed that is hot. No errors, been running for almost 16 hours at this speed and temps. Also, has anyone who opened their miner up applied better thermal paste/compound and seen better results?

What voltage setting did you use for 20ks?

I would like to point out that just because those integrated switches are rated for the current, does not mean that they would be happy operating there with their thermal design. As well, the inductor value might not be optimal for the higher current operation. As well the output capacitance might not be suitable for the higher ripple currents (especially a concern since the bulks look like tantalum)

I would say if you can populate it to add the two other phases you'd be better off than redesigning the 4 phase design for higher current. But that's just my WAG.

From the intersil datasheet:

"• Intuitive configuration using the PowerNavigator GUI
- NVM to store up to eight configurations "

Maybe they stored a config for 6+2 phase and you could just add the parts and go?

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.

zcash and zen difficulty went down.

1 day difficulty -27.60

I'm also not getting anything close to those numbers. This is given that i haven't overclocked beyond 15k hashrate. I'm also not expecting to see the numbers anymore. Difficulty has been growing daily and I believe we're now looking at 30% increase in hashrate since last month (according to coinwarz difficulty chart).

At least it seems like we will be able to break even.

https://whatismyipaddress.com/

Well that was my first 24 hours on viabtc but my second 24 hours was already much less, around .165 ZEC.  I moved over to MPH to test the waters there but I have a feeling we are going to see pretty serious and regular profit decreases in the near term here.  Hopefully it will level off a bit with bitmain not delivering anything (maybe they are building out their own mine though) and innosilicon maybe or maybe not having a lot of inventory at the moment.

It's your IP address.

whatismyip.com

How can you find the “public” IP of your Z9? I need it to change the payout threshold on Flypool.

I am on flypool and not getting that kind of number.  Where are you mining?

Hi there!
That curve tells that to generate as an example 360w(30A) @ 12v, the PSU will consume ~397w at 230v Line, or 404w @ 110v.

230v: 360 / 0.905 = ~397w
110v: 360 / 0.891 = ~404w

Small difference, but its still more efficient :-)