Folding Forum

The Folding@Home client is reading "Disabled" when I try to add a slot for this GPU. Is it no longer supported?

Ah, scratch the above, I needed to do a restart after a driver install.

While I'm here, would a PCI Express 2.0 slot limit thefolding performance of the GTX 680, a PCIe 3.0 card?

The GTX 680 is still supported, it is possible your copy of GPUs.txt is missing or incomplete. The client updates it about once a month, if the network connection is unavailable at that time or is interrupted you can get this "Disabled" result. See my longer answer to a similar question - viewtopic.php?p=357292#p357292.