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Zogo
Jul 29, 2003

TooMuchAbstraction posted:

Either way that seems like grounds for an RMA to me. Any counter-opinions?

Maybe. Make sure you're using the latest BIOS for the motherboard.

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Zogo
Jul 29, 2003

TooMuchAbstraction posted:

I'm curious as to your hypothesis; what would be the explanation for the failures I'm seeing?

I'll also note that the old card (the Radeon 5770) was able to use its HDMI port just fine.

Newer graphics cards are sometimes incompatible with older motherboards. Sometimes a BIOS update has been rolled out to resolve the issue.


You may be able to find the motherboard info out without opening case:
http://www.wikihow.com/Identify-the-Motherboard

Zogo
Jul 29, 2003

TooMuchAbstraction posted:

Any ideas on how I could tell if it was a mobo incompatibility as opposed to a GPU fault?

Not any simple ones that I know about. A lot of times with the GPU/motherboard incompatibility the computer won't even POST.


Also, you've tried other HDMI cables right?

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