Any reason to go over 850W for CF/SLI? Tags: Power Supplies Internet Explorer Graphics Cards SLI Components Last response: November 18, 2011 1:34 AM in Components Share methtical36 November 18, 2011 1:08:14 AM Looking to get comfortable breathing room for 2 high powered video cards, ie 2 6970s or 570s, with plenty of room for overclocking. I'm interested in the Corsair HX850, just wanted to be sure before I pull the trigger. More about : reason 850w sli jsc a c 144 ) Power supply a b U Graphics card November 18, 2011 1:21:44 AM Both cards (X2) pull about 30 amps under load, peaking at 40 amps. Figure another 10 amps for an OC'd CPU and another 100 watts for the rest of the system, the HX850 will do nicely. Raiddinn a b ) Power supply a b U Graphics card November 18, 2011 1:34:54 AM There is a lot of reason to go over 850w. PSUs last the longest and work most efficiently at 50% load. If you think that your SLId setup will take more than 60% of that 850 at load (!530w), you might want to get a bigger PSU. Doing so will keep the heat inside your PSU down, make it last longer, and save you money on power bills. Can't find your answer ? Ask ! Publish Related resources: ForumA good PSU around 850W ForumBest GPU(s) for i5-2500K + 850W PSU? ForumCould you give my build a once over ? Forum= 850W for 3570k build? ForumXFX Pro 850w CE vs Sea Sonic JS 750w ForumXFX PRO850W XXX Edition vs OCZ ZX-Series 850W ForumCan anyone recommend me an 850w Modular PSU? ForumGoing over budget! need advice ForumSLI two GTX 580's with an 850W PSU ForumIs there any reason NOT to Crossfire at 1080p? ForumThree monitors in portrait setup, should I go GeForce or Radeon? ForumMAJOR QUESTION ! x2 5870's with a 850w ? ForumNorth Q 850W Black Magic... Good PSU ??? ForumI need a new rig, a very good one ForumAsus 4870 1GB DK, 850W PSU and PCI-E 1.0 x16 Slot ForumANY REASON to go for P67 Sabertooth over P8P67 pro? ForumWill this PSU be enough? ForumPSU for SLI 570? Plz Reccomend me one.. ForumAny cases with 4-USB 3 ports in front ForumOCZ ZX 850W to run 2500k @4.5 and 560ti sli oc More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !