I've been using this card for over 2 years now, and since some time it wouldn't be recognized by the motherboard and instead of using this card, now I can only use the onboard graphics. What could be the problem? I tried reseting the motherboard, tweaked settings in BIOS (I use the latest 2.20 version), and nothing works.

Sometimes, though, as I set the BIOS to use PCI-express card as default, it WOULD load, and I could attach my monitor to it, but it would work for one session only, and then it would switch back to the onboard graphics.

What is the problem here? Is my motherboard getting too old, and beginning to break down, or is there something I can do?