First rig up and running (4 x NVidia GTX 1070)

General
1

This is my first experience with cryptomining, and a great DIY project. :slight_smile:

Here are the specs:

  • Motherboard: ASRock H81 Pro BTC R2.0
  • CPU: Intel Celeron G1840, 2.8 Ghz
  • Power supply: Corsair RM 1000x
  • Memory: 2x4Go Crucial CL9 Ballistix Sport XT DDR3
  • SSD: Samsung EVO 120Go
  • URBest PowerButton
  • 6 x PCI Riser (Ubit on Amazon), 6 pack
  • 3 x EVGA GTX 1070 FTW2
  • 1 x Zotac 1070 Amp!

I built myself an open air case using 2"x1"x8’, some wood screws, and trial and errors (I’m definitively not a carpenter!). I started to build the whole thing using screws and carpenter glue… Just don’t use glue, unless you are confident to get things right the first time! In the end, I’m pretty satisfied with the result, but I had to guess most of the dimensions because I didn’t received the parts when I started to build the case. I used some images on the Internet as inspiration sources (like this one).

Now, for the software part, I use EWBF 0.3.4b miner running on Linux Mint 18.2 and XFCE desktop (more lightweight than Ubuntu and comes with good proprietary drivers support like NVidia’s). I was able to setup all parts using information found at different places on the Internet (I might write a simple and complete tutorial some day…).

At this moment, I’m running the 3 EVGA 1070 FTW2 cards @ 80% power, GPUGraphicsClockOffset +100, GPUMemoryTransferRateOffset +1300, Fan speed @ 75%. The Zotac 1070 Amp! can’t go higher than GPUGraphicsClockOffset +100, and GPUMemoryTransferRateOffset +900 without crashing.

With that setup, I can squeeze between 480-500 Sol/s from the EVGA’s card and 460-480 Sol/s from the Zotac card. I could probably push the EVGA cards a little bit more because they seem pretty stable, and the temperature are stable (around 60-65 Celcius (I use a big desk fan to cool them down). I have a total efficiency of about 3 Sol/Watt, and between 1890-1930 Sol/s total with peaks at 1950+ Sol/s.

Here is an example of one peak at 1950 Sol/s:

Temp: GPU0 61C GPU1 64C GPU2 65C GPU3 54C
GPU0: 505 Sol/s GPU1: 468 Sol/s GPU2: 482 Sol/s GPU3: 495 Sol/s
Total speed: 1950 Sol/s

Note: GPU1 is the Zotac 1070 Amp!. GPU3 temperature sensor doesn’t seem to work properly and always returns results 10 degree below the other cards.

2

if the cards you have in the roll and GPU3 is in the first in line it may be posibble due airflow …

3

In fact, it is the last on the right of the case (if we look from the “HDMI end” of the cards) and GPU2 is blowing air on it…

EDIT: I reduced shortly the fan speed to 40%, and the temperature did increase over 60 degree, so it might be correct after all.

4

try to swap it and you will see :slight_smile: btw nice results from 1070

5

Thanks. I think I can squeeze some more juice from the EVGA FTW2 cards, those are overclocking monsters! I’m really impressed.