Did I miscalculate system power needs? Tags: New Build Power Supplies CPUs Motherboards Systems Product Last response: January 29, 2008 3:46 AM in Systems Share Seraphic January 28, 2008 11:09:15 PM I think might have picked up too small of a power supply here. I'm seeing reports that the 3870X2 uses 300 to 400 watts. Then for the motherboard and CPU it is another near 400 watts. (not using same CPU, but will be using same motherboard and Q9450 CPU) http://www.tweaktown.com/reviews/1271/14/page_14_power_consumption_tests/index.html Then I'm going to have several 120mm fans, fan controller, DVD/CD-RW, floppy, two PCI cards, and two PCIe 1x cards. I went with the below power supply, but it seems I don't have enough, right? http://www.newegg.com/Product/Product.aspx?Item=N82E168... Thanks More about : miscalculate system power zenmaster January 28, 2008 11:58:33 PM You have WAY more power than you need. The corsair 510w would do you more than fine. The numbers you are reading for for the WHOLE computer with the Graphics card in it. Hence the term "Total System Power Consumption". Seraphic January 29, 2008 12:19:59 AM I also forgot to add two or three hard-drives in raid 0. But thanks for pointing that out Zen. Looks like I didn't read it right. Just interested to know, would that power supply be enough for two 3870x2 plus the rest of the system I listed above (if I ever wanted)? Related resources What would happen if Iran did get the bomb? - Forum XEON or i7 - Forum What are PSU/Other Requirements To Run GTX 570 - Forum I7 920 x58 gaming rig, final list, need opinions - Forum New PSU Advice pleae! - Forum Can't find your answer ? Ask ! Get the answer Gravemind123 January 29, 2008 1:23:15 AM It should be fine for it, even a 600W-650W high quality power supply could manage to run dual-3870X2s and a couple of drives in RAID. beurling January 29, 2008 2:32:05 AM "Then for the motherboard and CPU it is another near 400 watts" lol.... what mobo and CPU draws that kinda power!!! nvalhalla January 29, 2008 3:46:17 AM maybe a server board with 2 prescott cored P-D based xenons, and a full array of FBDIMMs Can't find your answer ? Ask ! Publish Related resources: ForumPTO errata suggestion ForumStereophile & Cable Theory ForumFolding@Home: THGC Needs You -Team 40051 Forum[XP] Missing or corrupt File! Please help! ForumScreen flickers ForumHelp with building my first computer? ForumDid I choose a good power supply? ForumSystem did not start up help ForumNorth Korea Messed Up Again ForumUnlocking the 3rd and 4th cores in AMD phenom 2 x2 550 BE ForumSystem crash during games - did I fix it? ForumWhy did power supply fan kick into high after chassis fan swap? ForumHelp Building $700 Gaming PC ForumRecommend parts for a low power media server! Forum220v/110v AC Power connector controled by the computer. More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !