Soldato
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My gtx1070 was being blitzed by a 1000W Antec bought in R9 390 crossfire days, overkill or watt? 
PSU Wattage. Help?
- Thread starter Andy MacT
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Soldato
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- 6 Jan 2012
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The Rainforest sells 850W psu's with less +12v power. Cheap nasty and dangerous.
The power that the +12v rail provides is what will determine if a PSU can run a particular GPU (and CPU+GPU combo). The rest of the claims ("you need 600W PSU!" etc) you find even on the GPU manufacturer webpages, are "for dummies" nonsense and can lead to mistakes being made when purchasing (garbage).
Soldato
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Just a quick heads up as I'm not sure it was adequately explained.
When you look at the rating plate on your PSU, the most important figures are the +12v numbers as they are the grunt of the PSU that drive the power hungry components. Take the picture above, 34A * 12V = 408W (A*V=W)..
Your Corsair RM850 has 12V * 70.8A = 849.6W with peak efficiency at around 50% of max load, so runs most efficiently @ 400-450W.
It's always worth checking these figures for yourself, as some crap manufactures fudge the figures by adding all the W totals together to give the PSU wattage, when it's almost exclusively the 12V that you should be working with.
When you look at the rating plate on your PSU, the most important figures are the +12v numbers as they are the grunt of the PSU that drive the power hungry components. Take the picture above, 34A * 12V = 408W (A*V=W)..
Your Corsair RM850 has 12V * 70.8A = 849.6W with peak efficiency at around 50% of max load, so runs most efficiently @ 400-450W.
It's always worth checking these figures for yourself, as some crap manufactures fudge the figures by adding all the W totals together to give the PSU wattage, when it's almost exclusively the 12V that you should be working with.
Duly noted. I'll keep this in mind for the future. Thanks