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GPU issue powering on computer

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  • Graphics
Last response: in Graphics Cards
March 9, 2014 11:51:08 PM

Hey, I just have a quick query. I have a 7950 GPU by XFX.

The card prevents POST if the 8pin and 6pin connectors are connected to the PSU/GPU. However, without those two connectors, the computer turns on just fine, and the fan on the 7950 is spinning. There's no use to running the card without the two connectors, so I was wondering if anybody knew what is causing this?

I've tried various motherboards, PSU's, outlets, everything. This card causes this on every system.

I'm starting to admit to myself that the card is indeed broken, however, the fact that the fans still spin without the two connectors still gives me some hope.

Anybody have any idea?

EDIT: PSU used is more than enough, 860 watts for 1 GPU, 1 stick of 4GB ram, CPU, etc..

More about : gpu issue powering computer

March 10, 2014 2:20:40 AM

yes that psu is more than enough, hmmm have you tried using another pcie slot, but you say you have tried various mobos and psus it is indeed a bad card. if it isnt the card it would have to be mobo or psu, since you have used multiple configs then it is indeed the card. only one question though when you used it on the other system/setups did you have both psu pins connected?
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March 10, 2014 7:57:53 PM

Bad_Kitty13 said:
yes that psu is more than enough, hmmm have you tried using another pcie slot, but you say you have tried various mobos and psus it is indeed a bad card. if it isnt the card it would have to be mobo or psu, since you have used multiple configs then it is indeed the card. only one question though when you used it on the other system/setups did you have both psu pins connected?


Thank you for your reply.

I have indeed tested every single PCIE slot available on various motherboards, using various PSU's. All the computers I have tested this GPU on are fully functional without this GPU (boot up just fine, everything works).

And yes, I did connect both PSU pin on all the other setups, as well as testing it without the PSU pins.

I'm just a little confused as to why the GPU fans spin and the computer boots up fine when the pins are not connected. Is this a sign that the GPU might still be functional? Or does that just mean the fans on the GPU turn on regardless of whether or not the GPU is broken?
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March 10, 2014 10:27:08 PM

sorry i just had to ask, i figured you did but just to cover all bases. the card must be drawing power from the pcie slot to run the cooler. the cooler is seperate from the card though it is the same as a heatsink on a cpu. if the cpu is bad the heatsink fan will still run. you have done exstensive troubleshooting already and it is indeed the card. sorry about your luck. are you still in an rma window or under warranty?
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March 11, 2014 3:05:39 AM

Bad_Kitty13 said:
sorry i just had to ask, i figured you did but just to cover all bases. the card must be drawing power from the pcie slot to run the cooler. the cooler is seperate from the card though it is the same as a heatsink on a cpu. if the cpu is bad the heatsink fan will still run. you have done exstensive troubleshooting already and it is indeed the card. sorry about your luck. are you still in an rma window or under warranty?


That's what I was wondering. Thank you for answering my questions, I really appreciate it.

Yeah, I'm still under warranty -- I just wanted to double check before packing things up.
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March 11, 2014 2:40:15 PM

glad you can still get a new one
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