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PSU-Enough Power?

post #1 of 11
Thread Starter 
Hey people i have a question for you.

First of all these are my comp. specs

MB: Asus M4A79XTD EVO
CPU: AMD Phenom II X6 1055T 2.8 GHz (OC 3.4 GHz)
GPU: Sapphire Radeon 6870 1GB GDDR5
RAM: 8GB Hyper X Limited Edition 1600MHz
HDD: WD 250GB i Maxtor 250GB
PSU: Cooler Master GX 650W

Now my question is...

If i add another 6870 in crossfire x will my current power supply have enough juice to power them both and my other components.

Thank you.
post #2 of 11
Yes. The 12v rail has 52A which is more than enough for dual ATI cards.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by BizzareRide View Post
Yes. The 12v rail has 52A which is more than enough for dual ATI cards.
Thank you for quick response.
post #4 of 11
No, or just barely. The GX650 is overrated and cannot provide its full rated power, violating ATX specifications around 500W.

Ironically, it can provide more in-spec power than the GX750, which violates ATX specs for ripple and noise around 450W.
Edited by Phaedrus2129 - 3/13/11 at 3:22pm
post #5 of 11
Not sure I'd want to do that myself, it might just about work but you're almost certainly going to go out of spec on the PSU and be near the limits of what it can do. Take a look at what Phaedrus has to say in his awesome On Coolermaster post:

Quote:
Originally Posted by Phaedrus2129 View Post
GX 650W - 750W:
The GX series is marketed by CoolerMaster toward gamers as a budget PSU. The naming scheme is reminiscent of Corsair's "*X" nomenclature. Don't be fooled. Only the 750W model has been tested; it was found that the +3.3V ripple goes out of spec at 450W load, and the +12V goes out of spec at 550W. If you've read my articles you know that excessive ripple hinders overclocking and can damage components. Thus this is no more than a 450W power supply in real use. The 750W's current price at Newegg is $80. Seeing as how you can get a Corsair VX450 for $65 or a SeaSonic S12II Bronze 430W for $66, that gives this Seventeam-built CoolerMaster product a null value.
Edit: hah, beaten to it by the man himself
Edited by infected rat - 3/13/11 at 3:25pm
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post #6 of 11
Thread Starter 
Thanks for the info guys, then i will buy better PSU instead.
post #7 of 11
What do you have in mind? You can easily get away with a 450-550w PSU.

Quote:
Originally Posted by munjakos View Post
Thanks for the info guys, then i will buy better PSU instead.
post #8 of 11
check here http://www.antec.outervision.com/

and from what i saw it says you only need 500 so that 650 should be fine
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by Darksoul844 View Post
check here http://www.antec.outervision.com/

and from what i saw it says you only need 500 so that 650 should be fine
I used a calculator already and it says around 500w but some people say that GX650W PSU is garbage and others say it's great so i don't know what to do.
post #10 of 11
Quote:
Originally Posted by munjakos View Post
I used a calculator already and it says around 500w but some people say that GX650W PSU is garbage and others say it's great so i don't know what to do.
Anyone who says it's great is likely unqualified to speak on the subject. The GX650 is irrefutably crap.
http://www.hardocp.com/article/2010/...supply_review/

It failed HardOCP's testing regimen and had mediocre to bad performance throughout.

It might work for you, but I'd highly recommend a power supply that can actually do what the label claims within the ATX12V specifications.
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