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Title: Potentially Overloading My PSU Post by: ss317 on June 21, 2017, 04:12:55 AM 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. Title: Re: Potentially Overloading My PSU Post by: bathrobehero on June 21, 2017, 09:11:10 AM 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. Title: Re: Potentially Overloading My PSU Post by: deadsix on June 21, 2017, 09:38:06 AM 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 Title: Re: Potentially Overloading My PSU Post by: QuintLeo on June 21, 2017, 07:08:32 PM 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. Title: Re: Potentially Overloading My PSU Post by: ss317 on June 21, 2017, 11:27:10 PM Thank you for your responses!
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