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Is an 850 Watt PSU enough or should I upgrade

Last response: in Components
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Right now I have a Seasonic 850x Gold rated psu. The Seasonic is a good quality psu so it should be able to put out the said 850 watts on the rail. I'm doing so upgrading and what I want to know is should I keep the 850 watt or upgrade to a 1000 watt PSU? This is what I have now

I5 2500K
Radeon 6970
8 gigs of Corsair Vengence Ram
850 Watt psu
1TB HDD
128mb SSD
GA-Z68X-UD4-B3 Mobo

I would like to do another 6970 for a crossfire config and of course over clock them. I would also like to put in a custom water cooling loop and once thats all done overclock the CPU. My concearns are the overclocked cpu, and overclocked dual video cards will really stress the PSU. Add that to a water pump and rad fans and all that its really going to start pushing the edge. So will a 850 watt PSU be enough or should I go with something bigger just to be safe?

More about : 850 watt psu upgrade

Power supply Master

I would go with the 1000w psu because it sounds to me that you will be adding even more later on and you want to have enough power to do so. Besides like you said you start adding fans and a pump and another card it starts to add up. I started out with a 1200w and added a second psu because I just kept adding.
Power supply Authority

If you want to objectively, accurately and scientifically determine what PSU power is required for your Vid card and PC in both watts and 12v rail amps., the forum Utility link below will show you how easy it is to calculate this information and objectively determine which PSUs are quality built, reliable PSUs that can meet your needs. Be advised that the available 12v rail amps. is just as important as the total PSU wattage. You need both to be correct.

http://www.tomshardware.com/forum/314712-28-please-read...
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