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Radeon 6850 ZCDC: Powering questions - Two PCI-E 6 pin required

post #1 of 9
Thread Starter 
Hello guys! I`ve got a quick question.

I recently RMA'd my BLACK EDITION 6850 XFX. The seller did not have the same model, so I requested the 6850 XFX ZCDC, and well, when It arrived today, I saw that it requires TWO PCI-E connectors to work (The old one only need one).

Well, My PSU is a Corsair 400cx, and it only got ONE PCI-E. My questions are:

1- Inside my PSU`s box, I found one of these: http://www.ebay.com/itm/Pci-E-Power-Adapter-4-Pin-Molex-6-Pin-Pci-e-/130511134607?pt=LH_DefaultDomain_0&hash=item1e6311df8f
Well, it seems to be an adapter, Should I use it to power the missing cable? Or the voltage of the 4-pin is different of some sort?

2- My GF has this one: http://www.corsair.com/builder-series-cx500-v2-80plus-certified-power-supply.html
And it says it has the two 6-pin ones, I could probably swap mine with hers (She's got an HD 6750, it only requires one PCI-E)

So guys, Will I need to swap PSUs or I can just use the adapter the came with the box?

Thanks in advance!
post #2 of 9
Does that 6850 not have a requirement of a 450w psu anyways, Id recomend the swap myself
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Alienware x51 r3
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post #3 of 9
Thread Starter 
Calculating the wattage, My specs would not go over 320W on full load. That's why I was recommended this pSU (It even can go 450w with no problem) I had an 5770 last year that also required 500w and worked just fine. I researched some posts and saw that this "Psu Requirements" is set by the manufacturers to avoid problems with prosecutions...

Well, question still open, anyone else can answer me?
post #4 of 9
Swap the PSU is better than using that adapter (less load on each line). However either method works.
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post #5 of 9
I think using the adapter will be fine, the CX400 is a good unit and will just about power the system. However if you can swap to a better unit with no downside then do it to be on the safe side.
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post #6 of 9
Thread Starter 
I intend to buy a new PSU next january, a 520C Neo Eco, but I do not have the cash right now... So using the adapter will really work with no problems until I manage to buy the new one? No chance of VGA damage?

Thanks again.
post #7 of 9
Quote:
Originally Posted by Benyelton View Post

I intend to buy a new PSU next january, a 520C Neo Eco, but I do not have the cash right now... So using the adapter will really work with no problems until I manage to buy the new one? No chance of VGA damage?
Thanks again.

6850 doesn't draw a lot of power to begin with. You should be okay provided you don't overclock until new PSU comes in.
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post #8 of 9
I used the same PSU to power my Phenom II 840T X5 and my 5850 for 6 months straight and everything's still working fine. I believe my 5850 actually draws more power than your 6850, so you should be fine.
 
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post #9 of 9
Thread Starter 
used the adapter, worked with no problems. Thanks for the support guys!!

Case Closed. Hope other people can check my post if they have a similar question.
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