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TheMumm

Using PCIE 6 to 8 pin adapters

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Try the 6 pin > 8 pin it will probably be OK and certainly won't damage anything.

 

Many power supplies with a 6+2 pin PCI-E connector are effectively wired this way anyway, six wires to a 6 pin PCI-E connector with the extra two pins linked somewhere to the ground wires on the 6 pin.

 

The 6 pin is rated at 75W but I've never been able to find a rating for the 8 pin but logically it should still be 75W. (The extra 2 pins on the 8 pin PCI-E connector are ground wires with no extra +12V capacity).

I was about to say this.

 

I wouldn't buy a whole new PSU just for the 8 pin plugs. I don't think I've ever seen an actual 8-pin connection going to the 8-pin plugs (like paul says it's usually two extra jumpered wires - both are grounds).

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The 6 pin is rated at 75W but I've never been able to find a rating for the 8 pin but logically it should still be 75W. (The extra 2 pins on the 8 pin PCI-E connector are ground wires with no extra +12V capacity).

That's awesome Paul, learn something new everyday! I always thought since the more power hungry cards got them, they were supplying extra power with the extra two pins. Seemed farfetched to gain double the current for only 33% more pinnage :P

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Well well well. Some interesting Developments:

 

Firstly, I'm going to have to return the PSU at some point. I will not be able to replace the PSU in this system - - the H2C cooling assembly has a power cord with a proprietary connector on one end with my PSU being the only one that it can connect to (listed as a P14).. I suppose I'll be driving back tonight to exchange / get that converter cable. And this 950 only has 1 24pin power connector and my Mobo needs a second.

 

I was always a pretty staunch supporter of my Dell system, people gave me all sorts of . for owning one, and I've always been happy with it. This proprietary stuff's unacceptable. If I wanted to buy a Mac, I would have. Bastards.

 

I've read places that the 8 pins are rated at 150W, but I've always questioned that for the same reasons, Paul.

 

On the bright side, now I at least know that I should probably start putting some cash away for a new processor and motherboard now before I start upgrading the rest of this nonsense. Aging DDR2-800 RAM and a BTX board aren't exactly the sexiest things anymore.

 

Cheers, gentlemen.

 

P.P.S. Also, in my scouring of the interbuts I was hard pressed to find my computer's Model mentioned ANYWHERE. I might post a tour of the damn thing while it's still in pieces on my table at home so others aren't bumbling around this thing like I have been.

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UPDATE:

 

I installed the power adapter. Machine boots fine, however, I have noticed some screen flickering (the display keeps going off, then coming back on). Any ideas, champs?

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This is happening when the PC is idle?

 

If your power supply as four 6 pin PCI-E connectors it's unlikely to be lack of power and I can't see the adapter causing any problem?

 

Did you completely remove your old graphics card driver?

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New problem:

 

I'm getting screen artifacts on the desktop. chunks of pixels at random spots on the screen that are off color or wrong, I hope this thing isn't already dying on me.

 

I used DriverSweeper to remove the old card. I was planning on doing a full system reformat sometime this weekend, but I want to solve this problem first.

Screenshot of artifacts:

post-69187-13060182666849_thumb.png

Edited by TheMumm

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Hmm...any way to test that card in another machine? It could be faulty (is it just me or are there a lot of DOA 6000 series cards???)...

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I think that 6pin to 8pin adapter that you linked would work just fine! That is the adapter that a few of my cards came with. The 2x6pin to 8pin would work also! I know my PSU has (2) 6pin and (2) 8pin PCIe connectors, and when I ran Tri-Fire with (3) 6970's on the 3rd card all that I used was (2) 4pin molex to 6pin PCIe adapters, and then the same 6pin to 8pin PCIe adapter that you linked Mumm, and my Tri-Fire worked just fine! For your system, a 600W PSU should work just fine. I'm not very familiar with the Ultra PSU's, but 600W seems to be plenty for what you are running to me! But, I think your PSU shld be able to handle 1 6970 :thumbsup:

 

edit: sorry, didn't see the new problem :blush: Like others said, I would make sure all drivers are wiped and reinstall the 11.5, if that doesn't work and you can't test the card in another PC like Waco sd, then I would RMA! Solving the problem before reinstalling windows though is pointless, especially since the reinstall may solve the problem anyway! I would try the windows reinstall 1st ( esp since you planned on doing it anyway) and see if that fixes the problem! You may have some old drivers hanging around somewhere causing the problems, and a windows install would take care of that!

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