Power supply needed

[Guest]

If i wanted to run a single ATI video card i know a 650w is plenty what power supply would i need if i wanna run 2 ATI video cards.. Mind there is a ASUS Crosshair IV Formula AM3 board, and a AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz.. do i need more power?

 

[Maziar]

What cards are you going to run in CF ?

 

[Guest]

Maybe like a hd 5000 series

 

[Guest]

what are your thoughts on a XFX HD585XZABC Radeon HD 5850 Black Edition Video Card - 1GB GDDR5, PCI Express 2.0

 

[Maziar]

For 2 5850's, a good 650W PSU such as Corsair HX 650W suffices.

 

[Onus]

Aww Maziar, you're no fun today; I was going to suggest that a 300W PSU would have no trouble with a pair of HD5450s...

Anyway, for a pair of HD5850s, the operative word here along with the 650W was "good." Quality modern PSUs have full range active PFC (no little voltage switch) and 80+ certification. Antec, Seasonic, Corsair, Enermax, and XFX are among the better brands. Other than Enermax, avoid any PSU with "max" in its name, as it is most likely a reference to the size of the pyrotechnic display or the number of parts it will take with it when it dies.

 

[Guest]

With this psu:

http://www.thermaltake.com/product_info.aspx?PARENT_CID=C_00001568&id=C_00001572&name=Toughpower+XT+875W&ov=n&ovid=

You can crossfire all these cards you see here:

http://sites.amd.com/us/game/products/certified/Pages/certified-power-supplies-details.aspx?item=525

Is Ati’s official site and the tests they made.
Is 875watts, 80 bronze, PSU and will fully cover your in feature.

 

[Onus]

It's also overkill, and when he's sitting at the Desktop or otherwise [mostly] idle, he'll be running it around 10% of capacity where efficiency will absolutely suck.

I'd probably choose a Seasonic X-650. It is over 88% efficient at 9.6% load.
http://www.jonnyguru.com/modules.p [...] 2&reid=169

 

[Maziar]

Yep,Seasonic X650 is also good(I think its cheaper than Corsair HX650 too)

 

[Guest]

80 bronze means you get near to 90% gold is near to 100% but expencive.

All the PSUs and their test:
http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx

All the PSUs and the Crossfire tests they made:
http://sites.amd.com/us/game/products/certified/Pages/certified-power-supplies.aspx

The ati sites can cover any quation he has.