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. m 0 l 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. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedIs Mantle reason enough to go for a R9 280 over a 770? Forum ANY REASON to go for P67 Sabertooth over P8P67 pro? Forum Another reason not to go nuts over HDTV Forum Trying to decide if worth it to go Z68 over P67, give me reasons Forum Solvedis there any real reason to buy an ssd over just another regular hard drive Forum SolvedCPU over heats for no reason. Forum SolvedMonitors go black (& white sometimes) for no reason. Forum SolvedR9 280X won't go over 50% usage. Forum SolvedMy graphics card over heats for no reason Forum Solvedgoing to buy a new GFX card. which one should i choose? with a reason too :) Forum Will a 750W power supply power this system, or should I go with 850W? Forum SolvedGTX 760 go slower when over heating Forum SolvedReason to go more expensive on mobo ? Forum Solvedbuilding gaming rig budget over $1000 should i go with AMD or Intel / Geforce for this? Forum SolvedReason to go Ivy Bridge? Forum SolvedWhat is the minimum amount of money i should expect to spend to run CS:GO over 100fps? Forum SolvedIs there any reason to buy AM3 motherboards over AM3/AM2+/AM2? Forum SolvedWill I go over my internet allowence? Forum Solvedframes wont go over 60 on gtx 760 Forum SolvedHow would I make my recorded video files automatically go over to an HDD from an SSD? Forum More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !