- Jan 15, 2013
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I have a 7900X, 4x GTX 1070, at least 4-8 DDR4 DIMMS. The GPUs are rated at 150W, the CPU is 140W but will get a mild overclock. Can I use a 1000W power supply?
the GTX 1070 cards can pull 150 each at full load
Why would mining be different than any other use?
It might work but I'd say it's cutting it close. With cards and cpu alone you're already at 740 watts. That's not counting the motherboard/ram itself (not really sure how much watts that usually uses? around 100? Just a guess) and then any other components like hard drive and fans etc. It will most likely be under 1,000 though so I'd say with a high quality PSU you should be ok.
it's all about what load you are putting on your system
Peak efficiency is usually around 50%. It tends to stay reasonably high over a wide range around that, but can drop very quickly below 20% for some PSUs. The 80+ Titanium spec addresses that by specifying minimum efficiency all the way down to 10% load, whereas previous versions only dictated efficiency down to 20%.My understanding was that a PSU with a high wattage spec, operating at below 20% capacity, is operating less efficiently than one operating at 40 or 50% capacity...
Peak efficiency is usually around 50%. It tends to stay reasonably high over a wide range around that, but can drop very quickly below 20% for some PSUs. The 80+ Titanium spec addresses that by specifying minimum efficiency all the way down to 10% load, whereas previous versions only dictated efficiency down to 20%.
This is why I used to like the reviews on SPCR, since they measured efficiency at power levels all the way down to what normal PCs use at idle.
We need to figure out exactly how much wattage does each card deliver. Im guessing 250 watts or around there. 4x of those cards cant live off a 1000watt PSU. You can try your rig with 1000w if it works I would honestly be shocked.