Solved Is my PSU big enough for dual 6870s Tags: Radeon HD Graphics Last response: March 23, 2012 10:04 PM in Graphics & Displays Share outlaw00000 March 23, 2012 1:44:27 PM I have a Kingwin Laser 750W and a HD Radeon 6870. Will I need a bigger PSU for a second 6870 or is this one big enough, here's my complete specs: CPU: i7 2600K @4.2Ghz Motherboard: Asrock Z68 Extreme4 Gen3 GPU: AMD HD Radeon 6870 Storage: 120GB Corsair Force GT, 1TB WD Green 5400rpm, 320GB Seagate Barracuda 5400rpm, 1TB WD external HDD Case: Coolermaster HAF 922 RAM: GSkill Ripjaw X 4GBx2 @1866Mhz PSU: Kingwin Laser 750W I also might add a hauppauge HD PVR in the near future More about : psu big dual 6870s bucknutty March 23, 2012 1:57:47 PM THe 6870 only draws 150 watts, so your PSU should be plenty for 2 of them. I cant find a reveiw that talks about the amperage requirments of the 6870. So you will need to check what the max amperage is of your PSU and what the 6870 might draw. Best solution Chainzsaw March 23, 2012 2:03:05 PM Share The 6870s CF require around 55-60 amps on the 12v rails and minnimum 700W PSU. So you should be good to go. Edit: Your PSU has a single RAIL at 62AMPs. You should be fine! Have fun. Related resources GTX 580 or 2 6870's in CF - Forum Case for CrossFire 6870s ? - Forum PSU for Xfire 6870s and i5 2500K - Forum Upgrading 6870: GTX 680 or XFire 6870s ? - Forum Upgrading To xfire 6870's - Forum Can't find your answer ? Ask ! Get the answer ___Malachi___ March 23, 2012 2:13:41 PM Well, each 6870 will draw about 150W or so under full load. Combined that's 300W. The PVR isn't going to draw more than 10W. Looks like you've got plenty of spare wattage. outlaw00000 March 23, 2012 8:22:03 PM Best answer selected by outlaw00000. georgew91 March 23, 2012 10:04:24 PM i was just about to ask this question but i have a antec truepower new 650w. could mine run 6870 cf Can't find your answer ? Ask ! Publish Related resources All 6870s are rear exhaust? Forum X38, x48 or P45 chipset? (Q6600 + 2x 6870s ) Forum Power Supply for Xfire 6870s or Xfire 5770s | Need Advice | Forum How far do I need to go to notice a big difference? Forum Is my PSU big enough ? Forum Crossfiring 6870s , will this 650W PSU suffice? (Would prefer examples) Forum AMD Phenom 965 Black or i5 2500k for dual 6870's ? Forum Asus gtx560ti directcuII-broken Forum [Solved] 3x GTX 580 SLI on 1000w PSU Forum [Solved] PSU good enough for gtx 680? Forum Whichis the best graphic card for pentium dual core e2180 Forum [Solved] NVIDIA GTX560 Ti 448 on a 500W PSU? Forum Dual Monitors Forum How to know if my GPU is getting enough power? Forum [Solved] Two different Radeon 6870s (which one to get) Forum More resources Read discussions in other Graphics & Displays categories Ati GPUs Graphics Cards Gtx HD Monitors SLI Crossfire Tuner Cards Radeon Video Diamond Multimedia Matrox Nvidia Palit PowerColor Asus Games !