Why do some mobos hate some GFX cards?

[Dangerous_Dave]

Hi all,

Just wondering if somebody could shed some light on this: I've had a couple of graphics cards over the last few months which simply would not post on my 1150-based bench test system (which posts any other card fine), but as soon as I slipped them into my 1155 PC or another 1366 based board, they worked fine.

I asked seller on these and he said there might be setting or whatnot that might be stopping them posting.

Does anybody have any ideas about this? (IIRC both cards were ASUS if that helps).

 

[Mauller]

If the board uses older BIOS and not UEFI then they may not post.

Quite a few newer cards only come with UEFI firmware and won't boot on a BIOS based machine.

If it is running BIOS still and has support to upgrage to UEFI then i would do so. Or i would also make sure that your testbed has latest UEFI if it already uses UEFI.

 

[Dangerous_Dave]

Thanks for info. Any other possible causes or is that really the main one?

 

[meldarthx]

Thanks for info. Any other possible causes or is that really the main one?

pretty much main one - as time has moved on; so have bios;

 

[Purgatory]

Other thing is you can contact the company that makes the graphics card and they may have another VBIOS for the card, EVGA and other companies I know will sometimes have a custom VBIOS they send their customers that have such problems. It probably needs a legacy VBIOS not a UEFI. Also another thing to check is if there is any custom or beta BIOS for the motherboard, I know ASROCK always update their BIOS for the old boards when new graphics cards or addon cards come out that may cause such problems and they are normally under the BETA BIOS or they will send you a BIOS for the motherboard that they may have that will work or if you are really lucky they may create one for you and send it as they may know the fault.


ALSO.. if they have a dual VBIOS switch on the graphics card check that too by switching to the other VBIOS, if your motherboard has a UEFI BIOS, try setting it to legacy mode, you may have to reinstall windows again if you installed it in UEFI mode. Could be the UEFI quick start stuff doing it.


Didn't AMD do the two VBIOS thing for a while on their cards where one was a legacy and other was UEFI compatible and no other settings changed (290/290x ?)? Been a while since I used a AMD card (last was a 5870).