I ordered a few of the new
Biostar TB250-BTC PRO motherboards with 12 x PCI-E slots and I'm just wondering how much electricity this rig is going to consume. I'll be running 12 RX470 8GB cards and Intel Celeron G3900 (rated to consume 54w) on this system. As reported by the mining community, a rig with 6 RX470s consumes just below 800w of power so just to stay on the safe side, my idea was to feed the motherboard, it's components and 6 GPUs with a 1000w power supply and the remaining 6 GPUs with another 850w power supply. Now would that suffice?
Comments
Maybe in simpleminer with some adjusting it's going to be ok.
From what i know. In windows you are limited to 6 gpus and in linux to 8.
That motherboard was designed to work with 6 amd gpus and 6 nvidia gpus.
But to answer your question. An rx 470 can pull from the wall,i think in the worst case like 150w (modded) . So doing the math from gpus you'll consume like 1800w . Plus cpu plus mobo and other peripherals let's say 1900w in the worst case and in the best case as you stated something like 1600w.
I think that the 1000w plus 850w psu will be sufficient if their quality is good. But using 2 psu you'll have to connect the ground from the primary psu to the secondary and short 2 pins on the secondary psu. For a simple method search on google(or ebay or aliexpress) add2psu.
Windows: max 8
Linux: "unlimited"(max i've seen was 14) with some tweaks
To be honest the maximum i've seen was 12 gpu on simpleminer i think. And yes it was after some tweaks. Unfortunetly for now my experience with linux is not that vast so i am not sure what was done in order for that to work.
It's obvious that you cand have a total power draw of 1000w on a 1000w psu. But i think if the maximum draw doesn't go over 950w it should be ok.
Plus 1000w psu are a lot expensive that the 850w at least in my area.
As for your questions.
If you use linux and know your way in there (maybe you'll find some tutorials or something) i think you should be able to mount 12 gpus on that mobo.
In windows i know the limitation is coming from drivers. I don't have much experience with linux so i'm not entirely sure about that.
As you said, I'll look into some tutorials on making it work on Linux. It should be possible. Thanks!
very strange, but I am not buying until I see someone running 12 of one brand on this mobo.
Anyway, for power, I highly recommend going with a server power supply. They are platinum rated and are meant to be running 24/7, and are usually much cheaper.
http://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-up-to-24-gpu/
Then you'll need a cheapo PSU for the board + SSD.
I have converted all of my mining machines to server power supplies and couldn't be happier. They are a bit noisy, but they are all in the garage.
And by the way, the numbers you are reporting above are after heavy undervolt, which can't always be achieved. Cards can be finicky and will take different wattages. I have some RX480/580s that are only taking ~60w, and I have others that I can't get under ~100w.
Here is a screenshot:
What you do to turn it on is, turn on the server PSU first, then press the power button to turn on the PC. You can leave the server PSU on through restarts, but make sure to turn it off before doing any PC changes or if you shut down the computer.
I forgot to do this once, and the GPUs got really hot. Now all my miners are running for 300+ hours before needing to be restarted.
What you do to turn it on is, turn on the server PSU first, then press the power button to turn on the PC. You can leave the server PSU on through restarts, but make sure to turn it off before doing any PC changes or if you shut down the computer.
I forgot to do this once, and the GPUs got really hot. Now all my miners are running for 300+ hours before needing to be restarted.
Core 1150 mem 2075 Vcore 975
Is claymore miner working for you on ETH or are you running some other miner?
Are you using Dual PSU or a single large one?
I hope this helps.
Power supply ratings are from usable (DC) power, not used (AC) power. The actual power used at the wall will be higher depending on the efficiency of the power supply at its current load level.
In the United States your breaker box will have 15 AMP breakers for most AC circuits. And each circuit will typically have lights and multiple power outlets operating in the room. The AC power will range from 115 to 120 volts. So the AC circuit can supply (115 volts times 15 amps) 1725 watts to (120 volts times 15 amps) 1800 watts before blowing the circuit breaker. With 93% efficiency, you will get 1604 to 1674 watts usable for your rig before you risk blowing a circuit breaker or burning wires in your walls to start a house fire.
I have one of these 12 GPU boards and I will be using two 850W gold power supplies and will only be using a mix of low power 470's and under volted 480's/570's adjusted so that no GPU will draw more than 110 watts.
Power supplies get their maximum performance at 80%-90% of their rated supply range. An 850 EVGA SuperNova provides up to 70.8 amps @ 12 VDC = 850 watts. So here's my math, 6x 110 watt limited GPUs = 660 watts per power supply. Mobo takes 75-100. Total = 1420 watts. With 90% efficiency power supplies this will consume 1578 watts or about 13.7 amps leaving enough amps to run a small display and Ethernet hub and non-incandescent room light. Nothing else (other than a surge suppressor) should be plugged in to any outlet on the same breaker circuit for safety reasons. Both power supplies will be running near 80%-90% capacity which should bring them into their most efficient power range.
If you are in the United States and you will use a 1000 watt plus an 850 watt power supply and you don't plan to OC and/or Mod your GPU's to limit power usage, you should make sure you are on a 20 amp AC circuit. And I don't mean just changing a 15A breaker to 20A. If you want to do that, you better have an electrician come out to inspect the circuit to make sure it is safe so that you don't burn down your house.