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Old May 1, 2011, 02:56 AM
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Default Corsair TX750 enough for 3 graphic cards?

Hi guys,

I was wondering if a Corsair TX750 would be enough to power two 5850 1GB and a 6950 (with unlocked shaders) while they are all folding, entailing they will all be running at full load. While folding, I don't expect to be using my PC much beyond light surfing or anything that would put my CPU load beyond 20-25%. Here is the rest of my PC specs:

Case: Antec 902 (3X120MM fans, 1X200MM) + 1X120MM side case intake
CPU: Intel i7 920 @ 2.66 Ghz
CPU Cooler: Noctua NH12UP (2X120MM fans)
Motherboard: Gigabyte DS4 X58
Ram: GSkill 3*2GB DDR3 1600Mhz
Soundcard: Auzentech X-Fi Forte
Hard drive: 3 Hard drives (2 7200 RPM, 1 5400 RPM)


If not, what power supply would you recommend? I was considering a AX850W but I am not sure if 850W will be sufficient either.

Thanks.
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Old May 1, 2011, 03:10 AM
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I'm going to say no on the 750W as I think it be just about enough or run at near 100% load most of the time. I would recommend something that is between 800-850W will be good like the AX850 that you have mentioned.
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Old May 1, 2011, 03:40 AM
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Corsair TX750W Power Supply Review | Hardware Secrets

Corsair TX750W Power Supply Review | Hardware Secrets

Corsair TX750W Power Supply Review | Hardware Secrets


Corsair TX750 750W Power Supply Review




all things stock,and your psu can output what it did once new?
if they fold under the same wattage consumption as general gaming sessions?

yes

AMD Radeon HD 6670 1 GB Review - Page 20/26 | techPowerUp

if under furmark like scenario?...hmmm...yes


1-




2-


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Old May 1, 2011, 03:41 AM
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If you're in a hurry, grab this one...

NCIX.com - Buy Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply - Corsair - CMPSU-850TX - in Canada

It's a great buy IMO. It will also give you some futureproofing. 70 amps on a single rail.
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Old May 1, 2011, 06:55 AM
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I would go with what mo' power suggests.
Its better to have the extra headroom.

ST
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Old May 1, 2011, 08:40 AM
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I would not GPU fold with your rig. I'd oc the snot out of the CPU and run bigadv instead. I'm pretty sure the ppd will be better than the crappy performance (and higher power consumption) of 3 ATI GPUs.
Then your PSU would be perfect for the job.
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Old May 1, 2011, 03:39 PM
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Quote:
Originally Posted by _dangtx_ View Post
Corsair TX750W Power Supply Review | Hardware Secrets

Corsair TX750W Power Supply Review | Hardware Secrets

Corsair TX750W Power Supply Review | Hardware Secrets


Corsair TX750 750W Power Supply Review




all things stock,and your psu can output what it did once new?
if they fold under the same wattage consumption as general gaming sessions?

yes

AMD Radeon HD 6670 1 GB Review - Page 20/26 | techPowerUp

if under furmark like scenario?...hmmm...yes


1-


2-

Thanks for the info, so it looks like my GPUs will draw around 300-400W maximum. If that is assuming 100% load, I think my TX750W should be fine. My current PC is just a single 4870 so my PSU has never even been close to being stressed so I am sure it can still output its rated capacity.

Quote:
Originally Posted by mo' power View Post
If you're in a hurry, grab this one...

NCIX.com - Buy Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply - Corsair - CMPSU-850TX - in Canada

It's a great buy IMO. It will also give you some futureproofing. 70 amps on a single rail.

Thanks for the suggestion, I was thinking about a modular power supply this time with greater efficiency (HX or AX850). I think it is only $20 more.

So the final consensus then is to upgrade or no? Do you guys think the power draw on a 5850 is 108W at peak/folding (100% GPU utilization) and 127W for a 6950 (flashed to a 6970)? If that is true, I am thinking my TX750W will be suffice.

Last edited by Asad_A203; May 1, 2011 at 03:45 PM.
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Old May 1, 2011, 03:47 PM
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:)

i wouldnt upgrade for fears of kaboom. i would upgrade for less cable clutter if the 100 bucks didnt matter? sure.
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Old May 6, 2011, 04:09 AM
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Well, I should update. Since I will be OCing the 5850s, and the ones I have consume 40W more at peak than the reference design (per card), I decided I should be on the safe side and upgrade my power supply. I wouldn't be concerned if I was gaming, but 24/7 folding will have it's toll on my power supply if it is running near its peak.

I opted for Cooler Master Silent Pro Gold. Same price as an HX1000W but much better/newer design and efficiency. It is taking forever to get here but the modular design should be nice change from the TX 750 =). Should also future proof me if I decide to upgrade to the 6 core i7s and OC the heck out of it or go triple crossfire 6970s .
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Old May 6, 2011, 06:46 AM
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That is probably the only CM power supply that can be considered okay right now (maybe the GX450 as well).

Hopefully it holds together for you, CM doesn't have the best OEM's.

ST
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