Enough power for the thirst of the 4890?

[Foxer57]

I am looking at buying a new system with a 4890(http://www.newegg.com/Product/Product.aspx?Item=N82E16814121308&cm_re=4890-_-14-121-308-_-Product), but wanted to make sure that I would have enough juice to support it.

I currently have a 550W PSU that is rated for 29A over 2 rails(http://www.thermaltake.com/PRODUCT/Power/TR2power/w0101102/w0101102.asp).

Is this enough because I really don't want to get a new PSU.

*Current Specs*
AMD Phenom II X4 925
2GB DDR3
Middle of the road Mobo.

 

[hunter315]

I wouldnt suggest it, even if those rails are additive the corsair 400CX provides 1 amp more and most people wouldnt even think to run a 4890 on a corsair 400CX.

The PSU calculator suggests atleast 290W with 0% capacitor aging and no fans so its going to be cutting it close since yours can only provide 348 on the 12 volt rail.

 

[jsc]

It will be close.

You may want to consider getting a newer PSU. A modern 550 watt PSU will put out at least 40 amps on the 12 volt rail.

 

[JohnnyLucky]

The Corsair VX550 power supply would be a good choice. It has a a large single +12 volt rail rated at 41 amps and two 75 watt, PCI-e, 6 pin, video power connectors which the 4890 requires . It earned high marks in technical reviews. It is a high quality psu that is reliable, stable, and comes with a 5 year warranty:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004