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Will my Corsair TX750 PSU be enough for 6950 2GB Crossfire?

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February 15, 2014 3:06:01 AM

Hey guys, I recently upgraded my processor/ram/mobo and I virtually poured all of my funds into them for the time being. I am currently running an XFX 6950 2GB card and its not enough for most games especially with my newely upgraded processor, so I thought of grabbing another used 6950 2gb from ebay cheap for ~ 170 USD and run it in crossfire. I don't have much funds left for GPU upgrade hence I am going the crossfire route and the performance should be enough for the time being.
However i suspect my PSU which is a Corsair TX 750W might not be up for the task. Here's what i have inside my casing taking juice from PSU:

* Asus Maximus VI Hero
* Core i7 4770K @ 4.2 (1.15V)
* Thermaltake Frio Advanced cpu cooler
* Corsair 16 GB Dominator (2x8)
* 5x 3.5" HDD's (3 WD Green/ 2 Seagate) About 9.5 TB total
* Pioneer Bluray burner
* HAF932 case which has 3x 230mm fan & 1x 140mm fan
* A WD USB 3.0 external HDD which takes power from the motherboard (no external power)
* XFX 6950 2GB

Do you think i can install another 6950 without having to upgrade my psu cause that would suck.

Edit: I just did PSU requirement test here to the best of my ability: http://www.extreme.outervision.com/PSUEngine

And it showed 717W power draw at 90% load, it didn't have the option for my CPU cooler so i think its risky business and taking the PSU to the limits.
February 15, 2014 6:01:09 AM

I think you are good to go. Im on 2 7870s on a 600W psu so i believe its possible.
February 15, 2014 6:50:13 AM

off the top of my head, your system (w/o graphics) is not getting to 200 watts.
( you have low voltage on the i7 - a stick of RAM is ~4 watts, motherboard chipset ~7 watts, fans ~5 watts, HDs 5-8 watts, bluray no more then 10 watts while burning . .)
a 6950 uses ~160 watts.

200+160*2= 520 watts

the TX 750 is a good PSU and will handle that w/o any problems.
February 15, 2014 8:03:18 AM

qbsinfo said:
off the top of my head, your system (w/o graphics) is not getting to 200 watts.
( you have low voltage on the i7 - a stick of RAM is ~4 watts, motherboard chipset ~7 watts, fans ~5 watts, HDs 5-8 watts, bluray no more then 10 watts while burning . .)
a 6950 uses ~160 watts.

200+160*2= 520 watts

the TX 750 is a good PSU and will handle that w/o any problems.

That's great, thanks for the info. I am off to do some bidding then.
!