Would anyone have some pointers on getting one of the mentioned adapters to work if cgminer is not accepting shares? I bought one and tried with a powered 16x riser. Windows recognizes the card, but cgminer won't accept shares. Interested to see how you got these working if there were any config changes necessary.
You resurrected a 2 year old thread? Honestly it's not worth the time or energy to get it working with so many proven motherboards out there.
Having said that, try increasing the PCI timer latency if it's available as a setting on your mobo.