Connecting PSU to GPU

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m4cru

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Jan 6, 2015
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My EVGA 500W has 2x8pin (6+2) connectors and my GPU requires 1X150W 8pin connector.

I also have a 8pin to 2x6pin adapter that came with my GPU.

Do I connect one of the (6+2) connectors directly to the GPU or do I use the adapter with both 6pin connectors connected from the PSU?
 
Solution
Darkbreeze
If you used a single 6+2 with the adapter, and it worked, you probably just didn't get the 6+2 plugged fully in to the GPU when you tried it as there would be no discernable difference aside from increasing the size of the cable. If one cable seems to not work, try the other. Make sure the two pin part gets fully seated.
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Don't use the adapter.

Use the 6+2 :

2sbvhww.jpg
 
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I have a r9 285 itx. I tried connecting the psu directly but the pc will restart every few seconds.

My pc will only boot up fully with the adapter. I also tried using only one of the 6+2 connectors with the adapter, which worked. Is that safe?
 
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If you used a single 6+2 with the adapter, and it worked, you probably just didn't get the 6+2 plugged fully in to the GPU when you tried it as there would be no discernable difference aside from increasing the size of the cable. If one cable seems to not work, try the other. Make sure the two pin part gets fully seated.
 
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Solution
To start with, the W1 series PSU is not great, being one of the lowest tiered models made by EVGA. It's clearly not one of the worst units out there, pretty fair in fact for the price, but maybe not the best choice for what I'd consider a high end card.

http://www.jonnyguru.com/modules.php?name=NDReviews&file=print&reid=384

That being said, it could be an issue with settings. Also, what resolution are you gaming at and what are the rest of your system specs? CPU etc?
 
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The free version of 3Dmark does not allow changes to the settings. Also, the physics score, which I think is dependent on the CPU, has been consistent with ~3300 each run. Is it normal for the graphics score to fluctuate that much between runs?

CPU: Intel G3258
Mobo: Gigabyte Z97N-Wifi
Memory: Crucial Ballistix Sport XT (2X4GB) DDR3-1600
Storage: Crucial MX100 128GB SSD
GPU: Sapphire R9 285 ITX
PSU: EVGA 500W

Oh and I play games at 1080p.
 
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I'm not getting consistent fps on games like Borderlands, Saints Row: The Third, Civilization V. The fps ranges from 14-59.

I switched back to the adapter and I'm getting 55-60. My gpu is running noticeably louder though. Is there a reason why I shouldn't be using the adapter?
 
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I'd say there's either an issue with the PSU or the card itself. If switching adapters and power cables around makes a tremendous difference in performance, then either something is damaged or you're not getting a good connection with something.

Against my better judgement, I'd say to maybe try the two 6pin into the adapter rather than just using it as and extension for one of the 6+2 pins, or did you already do that?
 
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I'm getting consistent fps with both 6pin cables hooked up to the adapter. This isn't the case when I use the adapter as an extension for one of the 6+2 cables.

Is the gpu not getting enough power from the psu with just one 6+2 cable? And what's wrong with using the adapter?

Edit: I'm getting inconsistent fps with both 6pin cables in the adapter now. :/ Is my psu defective?
 
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