Need help choosing Power Supply for new build Tags: New Build Power Supplies New Build Systems Last response: October 23, 2011 1:51 AM in Systems Share pabzOr October 21, 2011 7:53:18 AM Hi all. I need help choosing a power supply for a new build I am working on. Looking to do an mATX build in a small case. CPU: Intel Core i5-2500K MOBO: ASUS Maximus IV Gene-Z LGA 1155 Intel Z68 RAM: G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) GPU: EVGA GeForce GTX 590 (Fermi) Classified 3072MB 768-bit GDDR5 CPU Cooler: Corsair H60 or Corsair H100 (If I can make it fit in the case) SSD: Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD) And of course I will have an optical drive as well. And it will have 3 fans with the H60 or 4 fans with the H100. My main question is will 650w be enough? Or will I perhaps need a 750w or even 850w? I used the Corsair AX750 for my current build and am planning on using the same series of PSU. More about : choosing power supply build cutebeans October 21, 2011 8:14:23 AM The 750w will be better. The 650w is just risking it too much. yasir siddiqui October 21, 2011 10:20:28 AM cutebeans said:The 750w will be better. The 650w is just risking it too much. yup, you should buy 750w psu. Related resources Need help choosing a power supply for my new build . - Forum Need help on choosing power supply and case - Forum Need help on choosing power supply ! - Forum Need help choosing power supply - Forum Help Choosing a Power Supply - Forum Can't find your answer ? Ask ! Get the answer AdrianPerry a b ) Power supply October 21, 2011 11:00:27 AM A 700w PSU is recommended by Guru3D. You would probably be fine with a Corsair 650w unit, but to be on the safe side, 750w is probably the best choice. You at least then leave lots of headroom for Over-clocking and other hardware. pabzOr October 22, 2011 12:29:22 AM Ok thanks guys. So an 850 would be overkill? cutebeans October 22, 2011 12:31:29 AM Yeah 850w would be pretty much overkill. yasir siddiqui October 22, 2011 10:49:34 AM cutebeans said:Yeah 850w would be pretty much overkill. Thats Right zooted October 22, 2011 12:21:44 PM A gtx 590 in a mATX case? I wanna see that pabzOr October 23, 2011 1:51:58 AM Lol. It should have no problem fitting in my new fractal design design mini once i remove the HDD bays. It would even fit inside my cheap-o 30 dollar broadway com corp case. Can't find your answer ? Ask ! Publish Related resources: ForumNeed Help Choosing a *Quality* Power Supply - i5 2500K ForumNeed help choosing power supply ForumNeed Help choosing power supply FAST (tonight) ForumNeed help choosing Power Supply ForumNeed help choosing a power supply ForumNeed help choosing PC parts for new build ForumHelp ` choosing a power supply ForumChoosing a power supply help . ForumHelp choosing NEW Computer Case and power supply ForumNeed help choosing Power Supply ForumHelp choosing a Power Supply ForumPCI compatibility question Forum[Solved] New Budget Build - For Uni Student - Limited/Minimal Gaming ForumNew build not POSTing ForumWanted a final overview of the components selected for my pc build. More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !