Solved Will this PSU be enough power for the HD5870? Tags: Power Supplies Power Thermaltake Components Last response: November 9, 2009 6:41 PM in Components Share sincreator November 6, 2009 2:51:01 PM My PSU is the 750w thermaltake toughpower. It says 18a per 12v rail. It has 4, 12v rails. It says 60a combined loading max. I have the 5870 on order. Recommended amps per rail is 20a.(40a total, since it uses two rails). So what does this all mean? Is 18a per rail enough, or will it use more since I will be using only 2, 12v rails. Here is the specs for this PSU: http://www.thermaltake.com/product_info.aspx?PARENT_CID... Can someone that actually has some true knowledge on PSU's please answer. Not people that are just assuming please. More about : psu power hd5870 TheViper a b ) Power supply November 6, 2009 3:24:13 PM That's more than enough power for the HD 5870. You have 60 amps on the 12v rails and the HD 5870 requires less than 1/3rd of that. Actually, you've got enough to go Crossfire if you wanted. Best solution JohnnyLucky a c 248 ) Power supply November 6, 2009 8:33:24 PM Here are the official power requirements for the brand new ATI Radeon HD 5850 and HD 5870 video cards. ATI Radeon™ HD5850 System Requirements: PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended 600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode ATI Radeon™ HD5870 System Requirements: PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended 600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode The power supply recommendations are for an entire pc system. Figure about 40 amps on the 12 volt rail(s) for two cards operating in Crossfire mode Related resources HD5870 + Q6600 & Bad PSU = Huge frame drops? - Forum VX550 enough for a HD5870 ? - Forum Can my 3 year old 500W PSU handle an HD5870 ? - Forum Noob needs HD5870 power advice - Forum Computer Lag i7920 HD5870 6 gigs ram and msi platinum motherboard ! - Forum Can't find your answer ? Ask ! Get the answer redkachina November 7, 2009 12:00:55 AM Its more than enough - I use my 425w enermax PSU with Phenom II 720 along with a GTX 275-which has higher idle/load power consumption than a ATI HD 5870! sparky13 November 7, 2009 2:01:39 PM You are good to go w/that PSU my friend. Enjoy that new GPU! sincreator November 9, 2009 6:41:15 PM Got the 5870, and all is good. Thanks guys. Can't find your answer ? Ask ! Publish Related resources: ForumBest CPU to pair with a HD5870 ForumOCZ StealthXStream 600W+ HD5870 CF ForumHD5870 crossfirex on Asus P6T ForumNew HD5870 Malfunction ForumQuestions about HD5870 CrossFire & HD5970, need suggestions ForumHelp choosing between GTX295 and HD5870 ForumHD5870 in crossfire and crysis ForumRadeon HD5870 Underclocking ForumATI HD5870 CPU Bottleneck ForumHD5850 and HD5870 ForumHD5870 / HD5850 Reviews and Discussion ForumIntel or AMD for an hd5870 ? ForumWill a Ultra LSP550 watt power supply support a HD5870 ? ForumPSU Help ForumWill my Toughpower 650W power a AMD 5850 build? More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !