It does look like the CPU card would cover the RAM slots in that case, I never did look into the duals.

and the mounting holes are backwards.

Click to expand...

but how can the mounting holes be backward when you have two on either side of the connector and one on the other side of the CPU? (unless you are rotating the card, but it could never actually connect in that case.)
Actually, I should mention that a single CPU Sawtooth/GBE heatsink blocks one of the RAM slots in a DA/QS but the other two remain open.

http://www.poopr.org/images/uieyoazu70zugrg7q8ll.jpg

IIRC it is only the heatsink, so you could trim it if you were *really* desperate. but this is really only good for testing or a very dire emergency.