Solved How much power? Tags: Power Supplies Build Power Components Last response: August 8, 2012 6:25 AM in Components Share gxavier38 August 8, 2012 5:58:46 AM Hey guys. According to my calculations, my friend's build will need 700W of power. Online calculators say 800. Which is it? i5 3570k 2x 7950 One SSD One 5400 RPM HDD Regular/low end Z77 motherboard. Forgot which one. Will check again. More about : power | E-mail me updates | Report abuse Register or log in to remove abekl Power supply Authority August 8, 2012 6:00:39 AM The 7950 practically sips power. I would go with the lower estimate and get a 750w PSU | Report abuse amuffin Power supply Master August 8, 2012 6:02:26 AM About 650W. Total power draw would actually only be around 450W, but a 650W will be the most ideal PSU that will have all of the connectors for the GPU's. | Report abuse 2260121 August 8, 2012 6:04:37 AM I would say 800W to be sure or if he wants to overclock the cpu and both gpu and add some fans. But i have a question. Why 2 7950 ? one is not enough? | Report abuse Related ressources How much power for a custom Water loop? - Forum How much power do these graphics cards use? - Forum Anyway to tell about how much power your pc uses in a day or month - Forum How much power do I need? - Forum how much power supply do i need - Forum Ask the community Publish gxavier38 August 8, 2012 6:07:15 AM 2 for the future. Oh and yes, I will overclock it. Not extreme tho. | Report abuse Best solution amuffin Power supply Master August 8, 2012 6:08:34 AM 2260121 said:I would say 800W to be sure or if he wants to overclock the cpu and both gpu and add some fans. But i have a question. Why 2 7950 ? one is not enough? 800W? Even overclocked a 650-700W will be able to power his entire system. | Report abuse Hazle August 8, 2012 6:14:28 AM extreme outervision's PSU calculator's giving me 608W, assuming you OC the CPU to 4.2ghz at stock voltage. but considering the site's tendency to over compensate, you could probably run it with 550W if you OCed nothing at all. but assuming you do OC, 650W is a safe maximum | Report abuse dudewitbow Power supply Authority August 8, 2012 6:17:52 AM 700 sounds right if you ever want to add more to it. | Report abuse 2260121 August 8, 2012 6:19:39 AM amuffin said:800W? Even overclocked a 650-700W will be able to power his entire system. Ok then, if you say so i believe you. | Report abuse gxavier38 August 8, 2012 6:25:03 AM Best answer selected by Gxavier38. | Report abuse gxavier38 August 8, 2012 6:25:06 AM Thanks guys. | Report abuse Register or log in to remove Ask the community Publish Tom's Hardware>Forum>Components>How much power?> Related ressources: ForumHow much power will I need for this gaming system? ForumHow much power is too much power ? ForumHow much power does OC consume? ForumHow much power ? ForumHow much power do I need? ForumHow much power supply/Watt ForumHow much power ? ForumHow much power ? ForumHow much power for my config? ForumHow much power do i need? ForumHelp! How much power on 1st build? ForumFirst Build - Need Help and How Much Power ? ForumOpinions and price of this PSU........... ForumHow much power for my PC? ForumHow much power do I need? More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !