PSU for Crossfire 4870 512MB, Core i7 920, 6 GB RAM

[zicogja421]

Hello. I am planning to purchase a computer from either ibuypower.com or cyberpowerpc.com and I would like some advice on the PSU that I should get.

 

I am looking at the Corsair CMPSU-750TX. I am planning to get the Radeon HD4870 512MB card, a Core i7 920, and 6GB of Corsair RAM, but I would like a PSU that will be ready for dual HD4870's in the future. Is 750W enough for all of that, and if so, is the Corsair my best bet? Also, I noticed the Corsair has 4 6+2pin PCI-E connections where the HD870 requires 2 6pin connections? I am guessing that the 6+2 connection is compatible with the 6 pin?

 

Also, do any of you have experience or knowledge of those sites? I don't want to build my computer, but I do want a good-quality cost-efficient site to shop for one on; maybe there is a better site to do that? Thanks.

 

Thanks.

Edited June 4, 2009 by zicogja421

[paulktreg]

The Corsair TX750W is a great power supply and will handle the 4870's with room to spare.

 

You're right about the 6+2 connectors they can be used as 6 or 8 pin.

 

Cheers

 

Paul

[DLS2008]

I prefer Newegg for computer parts and I recommend building your own.

 

The Corsair is good and so is PC Power and Cooling. 750W should be plenty. I have a 750W PC P&C Silencer running my Q9450 @ 3.6GHz, 4GB (2 x 2GB) RAM, 4870 1GB Crossfired, and 6 hard drives.

 

The 6+2 connections will work just fine with the 6 pins on the 4870s. It just has a 2 pin that can snap on the 6 pin to make it 8 pin. If you use it on the 6 pin 4870, you'll just have a little 2 pin piece hanging there, no big deal.

[Verran]

I prefer the PC Power & Cooling 750W personally (that's why I bought it ), but either that or the Corsair are a great choice. They both are very highly reviewed power supplies.

[ccokeman]

The Corsair TX750W is a great power supply and will handle the 4870's with room to spare.

 

You're right about the 6+2 connectors they can be used as 6 or 8 pin.

 

Cheers

 

Paul

 

I cannot argue this point as I used the Corsair to power an I7 rig at 4.1 GHZ with dual GTX 260 216 sp cards with the CPU water cooled and did not have one hiccup

[GabrielT]

I've heard good things about the corsair but if you are set on buying your PC and not putting it together I suggest cyberpower. But seriously why not save yourself a few bucks put it together yourself and learn some new things about your computer.