Corsair 650TX--enough for 5870 Crossfire?

[pcfspider]

These are on sale for $89, and I'm wondering, given the better efficiency of the 5850/5870 cards, if it would be enough to drive 2 of them. I was going to go with the corsair 850 and be sure...but I can save 40-50 bucks this way....

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

Worth shaving it close?

 

[andy5174]

Yes, more than sufficient. There are a lot of similar questions in this forum already. BTW, Corsair specify PSUs capable of supplying higher wattage at lower spec to achieve better 80+ result. For example, HX750 is actually a 80+ Bronze 950W PSU, but Corsair specify it as a 750W one so that it matches the requirement of 80+ Silver 750W PSU.

 

[delluser1]

These are on sale for $89, and I'm wondering, given the better efficiency of the 5850/5870 cards, if it would be enough to drive 2 of them. I was going to go with the corsair 850 and be sure...but I can save 40-50 bucks this way....

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005

This Antec is a few dollars more, but has all the connectors you would need for dual 5870's, and is more efficient.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371021

 

[JohnnyLucky]

ATI officially recommends a 600 watt power supply with 40 amps on the 12 volt rail(s) for a system with two 5870's in Crossfire mode. The Corsair TX650 has a single large 12 volt rail rated at 52 amps.

However, as Delluser1 correctly mentioned, two 5870 video cards will require a grand total of four PCIe power connections. The TX650 only has two PCIe power cables. The Antec TruePower New TP-650 with four PCIe cables recommended by DellUser1 would be a better deal. Just make sure it is the TruePower New and not one of the older TruePower models.

 

[pcfspider]

Great info, guys. Thanks for the responses.

 

[Rasclat23]

I was going to ask the same question about my Enermax Liberty 620W. Would this be able to run two 5850s?

 

[JohnnyLucky]

Here are the official power requirements for the brand new ATI Radeon HD 5850 video card.

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended

600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode.

NOTE - These are the power supply recommendations for an entire pc system. You will need 40 amps on the 12 volt rail(s).