2 4870s and i7 920, 700 watts enough?

[ponchato]

Title. I'm building a new computer soon, with only one Radeon HD 4870, but I plan on buying another to put it in crossfire soon. Will 700 watts be enough?

The computer will have 1 HDD, 1 DVD drive, 3 sticks of DDR3, and 5 120mm fans, in addition to the already mentioned components.

 

[theAnimal]

Which PSU? Does it have 4 PCIe connectors?

 

[ponchato]

Which PSU? Does it have 4 PCIe connectors?

It was a modular (only reason I chose it) Cooler Master PSU, but now that combo deal is over. The PSU I (now) plan on using is the 650 watt Corsair 650TX. It only has 2 PCI connectors, but the 4870 I'm getting comes with 2 power adapters so I'll be able to give power to the second one.

With the details changed, will 650 watts be enough?

 

[jsc]

Should be enough. But I would go one step upward to the 750TX. 60 amp 12 volt rail gives you plenty of power and it has 4 PCI connectors.

And it will produce 900 watts before it overloads and shuts down.

 

[Helloworld_98]

if it's the silent pro series then a 650TX is a downgrade, the silent pro 700w does 840w peak wattage.