Won't use GPU, Only integrated

[RobinHood5]

I picked up a Radeon 6950 2GB from a friend for a build i'm doing for another friend. I tested the card in my i7-5930k/msi motherboard rig and it seems to work fine. I put it in a computer with a i7-3770/gigabyte motherboard and it is not seen at all. Computer uses integrated graphics, GPU has power and fans are spinning, no matter what options I choose in bios it just keeps using integrated. Tried it in my i5-4690k server, same thing. The only thing these two have in common is the PSU and the molex/6-pin adapter I was using for one of the power connections. To test my theory that it was the PSU I threw it in my FX-8350/gigabyte motherboard rig that has true dual 6 pin and it worked fine in there as well.

 

After getting a 600w Thermaltake psu with true dual 6 pin and recieving the other parts for the build (i3-3240/Biostar Mobo) it is doing the same thing. Power to GPU, Only uses integrated, windows does not see another GPU, cannot install AMD drivers, etc. 

 

I am a seasoned computer builder and am starting to lean towards the GPU has got problems, anyone else have any ideas? 

[Synawke]

its a stupid question for a experienced builder.... but the hdmi/displayport is plugged into the GPU right?

[MisterK]

Have you tried in other pcie lanes?

Use a different graphics card on the board and test if the board isn't donezo

[MarcWolfe]

Gpu doesn't need plugged into monitor when using Windows. The GPU can output video through motherboard video port.

[Kirky2k15]

Does the gigabyte mobo have any options in uefi/bios to disable onboard vga?

[RobinHood5]

1 hour ago, Kirky2k15 said:

Does the gigabyte mobo have any options in uefi/bios to disable onboard vga?

With all boards I have tried fully disabling Integrated graphics or changing the default to PCI-E

[RobinHood5]

1 hour ago, MarcWolfe said:

Gpu doesn't need plugged into monitor when using Windows. The GPU can output video through motherboard video port.

No... Just No.

[RobinHood5]

1 hour ago, MisterK said:

Have you tried in other pcie lanes?

Use a different graphics card on the board and test if the board isn't donezo

I tested multiple pcie slots on one of the boards and all boards work fine with other graphics cards. 

1 hour ago, Synawke said:

its a stupid question for a experienced builder.... but the hdmi/displayport is plugged into the GPU right?

Yes, (Thats always my first question too). Connected to the GPU I get no video at all, I switch back to Integrated and it has video output (with GPU plugged in)

[RobinHood5]

One interesting thing to note is that the two computers I got it to work on happen to not have integrated graphics at all. I wonder if something is wrong with the card that it isin't detected at a point so it doesn't switch from integrated graphics. (I have tried completely disabling integrated with no change in results, except for no graphics output from the integrated)

[MisterK]

15 minutes ago, RobinHood5 said:

One interesting thing to note is that the two computers I got it to work on happen to not have integrated graphics at all. I wonder if something is wrong with the card that it isin't detected at a point so it doesn't switch from integrated graphics. (I have tried completely disabling integrated with no change in results, except for no graphics output from the integrated)

If you have already tried turning the IGPU off in the bios and they still don't work, I would just rma the card

[MarcWolfe]

2 hours ago, RobinHood5 said:

No... Just No.

Yes. 

 

[MisterK]

8 minutes ago, MarcWolfe said:

Yes. 

 

That is using a different interface. And no you cannot get video through the motherboard running off of a graphics card.

[MarcWolfe]

3 hours ago, RobinHood5 said:

 

You just seen it, yet you say no......