Crossfire 6950's psu?

[zod96]

Would a Seasonic Xseries Gold 750 watt PSU be enough for crossfire 6950 2gb?

 

[aaaahi]

Yep. You may want to splurge for an 850 to cover overclocking and future upgrades though.

 

[samuelmorris]

Ample, you can even run two HD6950s off a 550W PSU (and that includes having an overclocked processor), so 750 is plenty.

 

[jhokie]

Ample, you can even run two HD6950s off a 550W PSU (and that includes having an overclocked processor), so 750 is plenty.

550W would be pushing it too much for long term use, but it may work for a while. My rig pulls ~550W from the wall at full load on CPU & GPU. 750W PS works like a charm for me with CF 6950s.

 

[samuelmorris]

550W from the wall means no more than about 490-500W out of the unit though. That may be high but it's well within tolerance. I measured a system with a 286W card (4870X2) and an overclocked Q9550 to be 390W out of the PSU, so two HD6950s, which is really no more than 340W unless they're overclocked, suggests with a moderate quad core overclock, you're not likely to see more than 450W out of the PSU.

 

[crawlgsx]

I'm running a coolmax 950watt with a Sandybridge @ 4.6ghz, 2 6950's unlocked to 6970's, 4 velociraptors, an ssd, a 1.5tb hdd, and 8 fans so I think your probably fine.

 

[samuelmorris]

Despite how it looks, that lot's probably only 500W of draw out of the PSU. Just as well, with a coolmax!

 

[IdiotInCharge]

Running my 6950's and 2500k at 4.8GHz off of a 650w Seasonic- no worries. ~500w max draw at the wall.

 

[crawlgsx]

Despite how it looks, that lot's probably only 500W of draw out of the PSU. Just as well, with a coolmax!

I've had great luck with Coolmax, it's my 4th one (for different computers) and I've yet to have one die.