Thread: Would Corsair tx650w work for HD4870 CrossFire?

Just wondering if you think a Corsair tx650w would be adequate to run this system.
Or would i need to up the PSU to a Corsair tx750w or similar?


Intel Core2 Due E8400 (3.00 GHz, 1333 MHz fsb)

Asus P5Q PRO motherboard. Fsb: 1600 MHz

Ram: 4x 1GB Crucial Ballistix PC-8500

HDD: Seagate: 500GB, SATAII, 7200rpm, 16MB Cache (possibility of 2nd hard drive in the future)

Graphics: two ATI HD 4870 512mb (CrossFire) disc drive: 1x DVD-RW any help is much appreciated.

650 are easily enough. My 4870x2 crossfire rig with an over clocked i7 and 3 hard drives only pulls something like 800W full load (I'm using a Corsair HX1000). With a pair of 4870s and a 45nm Wolf dale, you'd be hard pressed to exceed 500W no matter how much you over clock.

Oh, and to the poster above with a 1kw and a pair of 9800 GTXs, that's way, way overkill. You only ever need a 1kw PSU for highly over clocked tri/quad GPU setups.

I just checked some of my reference material. Two ATI Radeon HD 4870 video graphics cards operating in Crossfire mode use a combined total of about 295 watts and 25 amps at full load. All of the reference material I checked clearly indicated the two cards use a combined total of less than 300 watts. That's not much compared to some of the other video cards. In addition, the rest of your system does not use very much power either. The Corsair TX650 is rated at 650 watts and has a single large 12 volt rail rated at 52 amps. As other poster have already pointed out it can easily power your system.