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Crossfire certified vs crossfire ready

post #1 of 12
Thread Starter 
I couldn't find a thread asking this exact question. When comparing a crossfire certified psu with a crossfire ready, is there much of a difference? I have a hd4670 and want to crossfire it with another hd4670, but I need a new psu to do it. Ati claims that I need a certified psu to handle it. I did some research and most people said that you don't need one, they just say that do boost sales. So yeah, can I use a crossfire ready psu and save a few bucks, or do I need a certified one?
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post #2 of 12
no difference
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post #3 of 12
You don't need a Crossfire ready PSU to use Crossfire. If you understand how the power is delivered and how Crossfire works, all you need is another PCI-E cable. If the 4670 needs a 6 pin power cable, then you need a PSU with 2 6 pins and probably an Antec 550w would be fine. If they don't, look for the cheapest Antec/Corsair/Seasonic PSU you can find that says 400w.
    
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post #4 of 12
Thread Starter 
The 4670 doesn't need an extra power cord, and said it needs around 550 watts. If I can use a crossfire ready power supply instead of a certified one, then that would be great. If I don't even need either, that would be better. I just want to make sure I'm not going to order something that doesn't work .
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post #5 of 12
Quote:
Originally Posted by Temos;12156295 
The 4670 doesn't need an extra power cord, and said it needs around 550 watts. If I can use a crossfire ready power supply instead of a certified one, then that would be great. If I don't even need either, that would be better. I just want to make sure I'm not going to order something that doesn't work .

This will work fine, the 4670 has a very low TDP, both cards will take a max of around 100w while gaming(each will take around 50w gaming, maybe like 65 while benching).
    
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post #6 of 12
Its a marketing gimmick. Just check the specs of the PCU manufacture to make sure it has the connections you need, and the amperage/12v rails needed to run your computer and you'll be fine.
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post #7 of 12
Thread Starter 
Thanks for the replies everyone. I think I know which psu I'm going to get now.
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882.5 total Windows 7 20.1" LCD BenQ / 17" LCD LG Generic 
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LifeSpeed
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882.5 total Windows 7 20.1" LCD BenQ / 17" LCD LG Generic 
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post #8 of 12
Quote:
Originally Posted by Temos;12156399 
Thanks for the replies everyone. I think I know which psu I'm going to get now.

Please show. smile.gif
    
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post #9 of 12
Thread Starter 
LifeSpeed
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LifeSpeed
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CPUMotherboardGraphicsRAM
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882.5 total Windows 7 20.1" LCD BenQ / 17" LCD LG Generic 
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post #10 of 12
The Antec you posted is nice. I personally perfer single 12v rails so I dont have to worry about re-cabling if I add componets. Something like this...
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371031
Future Proof 2.0
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Future Proof 2.0
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Samsung 850 Evo Samsung 850 Evo Toshiba Q Series Pro WD Black 
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