I'm setting up a rig with 6 gtx 1070s. Is a 1300w psu good enough to run it stably?
I run 6 comfortably on a EVGA P2 1200 power supply
I'm setting up a rig with 6 gtx 1070s. Is a 1300w psu good enough to run it stably?
Depends whether you aim for maximizing hashrate or going for optimum H/Watt.
If hashrate is your aim then go for it.
If power-saving with optimum H/W is your aim, you will lower power limit to 120W and raise core/memory clocks.
1300W PSU is definitely overkill in that scenario.
Thanks to both of you. That puts my mind at ease. I think I'll just go for maximum hash rate since I have 1300w. And just to clarify I'm running the motherboard/hdd etc off of the same psu. The power draw from those parts is also small so I assume that 1300w is sufficient for everything.
There is no need to go with such a high wattage power supply for a new rig (assuming new cards). I run rigs with 6 x 1070's @ 100% TDP on an EVGA 1000 watt power supply with no issues. I do have mine connected to 240v for a bit better efficiency but it works fine on 120 as well. Every new card that comes out from now on will likely draw less power than its predecessor even with the big guns. Nvidia's Volta is due early 2018 now, and AMD well who cares but they are trying...
Also, you get the best efficiency when using 85-92% of the available watts. A rig that draws 900W on a 1300w supply would be @ 70% and a waste of electricity and extra heat for the conversion.
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