Potentially Overloading My PSU

[ss317]

Hi Everyone,

PSU: 1200W Seasonic Prime Platinum
M/B: MSI Z170A SLI Plus
Processor: Pentium
6 GPUs: EVGA GTX 1070 Super Clocked (NVIDIA recommended 500W for the first GPU and add 170W for each addn'l GPU)
HDD: Sandisk 120GB SS
Other: 6 powered risers
RAM: 4 GB
OS: Windows 10
Mining Software: Claymore


I am new to mining and started to use claymore for mining ethereum.  I heard my PSU making weird electrical noises when I had all six GPUs running at once.  I called NVIDIA and they mentioned that the minimum PSU watt should be 1350 for six GPUs.  I have seen numerous videos online of people using 1200W PSUs with 6 or more GPUs (GTX 1070s included).  Am I overreacting or is there something that I am missing regarding these mining builds?  I haven't overclocked the motherboard yet or done anything of that sort - currently getting 155 MH/S with all 6 running.

[bathrobehero]

6*170 is 1020 watts plus the system is probably around 70 watts. That's 1090 watts.

Personally, I don't go above 80% on PSUs for 0-24h use so the effective capacity for me would be 960 watts.

Therefore if you were to reduce the power limit on the cards to 87% (147.9 watts per card) you'd end up with a total of 957.4 watts.


But, even if you were to use 1200 watts, the PSU should not make any weird noises other than the louder fan.

[deadsix]

I am new to mining and started to use claymore for mining ethereum.  I heard my PSU making weird electrical noises when I had all six GPUs running at once.  I called NVIDIA and they mentioned that the minimum PSU watt should be 1350 for six GPUs.  I have seen numerous videos online of people using 1200W PSUs with 6 or more GPUs (GTX 1070s included).  Am I overreacting or is there something that I am missing regarding these mining builds?  I haven't overclocked the motherboard yet or done anything of that sort - currently getting 155 MH/S with all 6 running.

If you're mining Eth, reduce power limit to 65% or even 60% with just an overclock on the memory and see what hash you get. You can get these cards down to ~100W each with minimal loss in mining performance and the 1200W starts looking like overkill
Find a perf/watt balance you are comfortable with

[QuintLeo]

That power supply SHOULD handle those 6  cards - if you keep the TDP no higher than 100%.
 It will be a LOT happier with the cards at 80% or less.

 TDP on that particular card at factory settings (I have 3 of them) is 155 watts, NOT 170.

 Best settings for ETH is normally "max overclock your ram can handle, then drop TDP 'till the hashrate starts dropping noticeably".
 They should handle at least a +400 (afterburner setting, or PrecisionX as I recall works the same on that) overclock on the RAM with good reliability.


 If your PS is making "wierd noises" though, you might have a failing PS. Even Seasonic has occasional "infant mortality" issues.

[ss317]

Thank you for your responses!