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HD 7950 x 2 with Corsair TX 650

Powermoloch

Powermoloch

Lifer
I'm expecting the GPUs to arrive this week, and planning to use them in my gaming rig (yeah i love my AMD >_>). Yet, I would like to know whether I should be fine running 2 HD 7950s (http://www.newegg.com/Product/Product.aspx?Item=N82E16814102962) with a Corsair TX 650. I've been reading alot of reviews about their power consumption and they average to 450-500 Watts on Avg.

I'm not planning to OC and would like to keep my system at stock.


Appreciate the feedback !
 
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I use an antec earth watt 750w to power 2x 7970 oc @1125mhz and i7 2700k @ 4.5ghz. During gaming, the killawatt reed 620w at the wall. Factor in efficiency, the psu is around 550w. You should be fine if you don't oc
 
Let me know how it works out. I have the same PSU and just one 7950, thinking about putting another one of those bad boys in here.
 
SheHateMe said:
Let me know how it works out. I have the same PSU and just one 7950, thinking about putting another one of those bad boys in here.
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So far so good. I made it through several stress test, several passes on Heaven, 3dmark 11, Vantage, a couple hours on COD:BLOPS, Witcher 2 and Skyrim. Do keep in mind that my system are on stock settings.
 
Damn. That just proves my HX650 would have handled 2x GTX 670s with ease. I upgraded to a NZXT Hale82 850w and I decided not to SLI. LOL


Nothing like an overkill PSU in my rig now, at least it was cheaper than the HX650 🙂
 
i ran a GTX 670 with a 430 antec psu and it played bf3 fine although i did not overclock it but i did have a 4.5ghz 2500k running with it
 
@Powermoloch, I have the same PSU(Corsair TX 650 V2). Currently I am running an i7 3770k CPU with stock fan on an ASUS P8Z77-V motherboard, with 2x4GB of G.Skill DDR3 RAM, a 7200 rpm 1 TB HDD, a 256 GB Intel SSD, a SATA DVD Drive, 4 case fans, and a Gigabyte HD 7950 GPU(http://www.newegg.com/Product/Produc...igabyte%207950). I plan to add in another piece of the same card for crossfiring.

How is your rig performing now in crossfire? As my GPU is factory over-clocked, should I under-clock them in crossfire mode(if I crossfire them), or will be TX 650 V2 PSU still support them?
 
^ He is overclocking both the CPU and GPU heavily, and is also having some water cooling system to power through the PSU. Besides, he has the 7970,not the 7950.
 
I was asking because the OP did use it to power his CF. I can under-clock the cards to negate the factory overclock if needed.
 
He's known for vastly overestimating power needs. Don't worry about it.

650W should be borderline when stressing two 7950s OCed. A 7950CF system draws around 500W in gaming, on stock settings. Not to mention, at worse overcurrent protection kicks in and shuts down your computer to prevent anything from burning up. There's no harm in trying, especially with a well-built PSU (which is likely to be rated below what it can handle).

From legit reviews:
Power Consumption Results: Our test system with a pair of AMD Radeon HD 7950 video cards running in CrossFire was observed using ~450 peak Watts at the wall during gaming. Idle performance of the cards was impressive and on par with what we saw with a pair of Radeon HD 7970 cards in CrossFire with an idle right around 100 Watts.
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