PSU for HD 4870

[Iesa]

Hi, iam unable to find info on the asus website to what watts i need to run the 4870 512mb version,
i asked people and they said a 500wat should be find but i would like more than just one to make my mind happy,

i have
Win power 650watt psu &
Processor: Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz (4 CPUs), ~2.7GHz
Memory: 4094MB RAM
Hard Drive: 500 GB
Video Card: NVIDIA GeForce 8600 GT 1GB Cards Dual x2
Monitor: ACER X223W
Sound Card: Creative SB X-Fi XtreameGamer Soundcard
Speakers/Headphones: 5.1 Logitech & Plantronics Headphone
Keyboard: Genius Keyboard
Mouse: Razer Diamonback Red
Mouse Surface: Kensington Mat
Operating System: Windows Xp™
Motherboard: ASrock Penrynl600SLI
Computer Case: Wizard Series Wi20a

i will be also swaping the mobo to a p5Q most likely and 8600gts to a 4870.
So could i have some tips or any think to help me out here as i have no idea when it comes with power.

many thanks.

[worm4u]

The 650W PSU you have already will work just fine for the hd4870, but if you intend to due any overclocking I would look into another PSU which is more reliable, preferably made by Corsair, PC Power & Cooling, OCZ or Seasonic. I am running my quadcore system with hd4870 1gb with my 500W seasonic PSU with the cpu and video cards overclocked just fine.

[Curt]

I would totally agree with this if the card really drew the full amount of power from both PEG connectors, but the TDP is only 160W. 75W from the PCIe slot + 150W from the two PEG connectors = 225W, so there's plenty of room to spare. I bet an adapter would work.

But if you're overclocking and you want to be absolutely sure your PSU is strong enough a Corsair VX550 would be a good choice.