It wouldn't hurt to try. Also I was looking at your first statement and I was wondering if that was a type-O on the 6920? Did you mean 6950? I hope it is just a driver problem. They work just fine with the newer monitor right? Have you tried one card at a time with the monitor? It is a long shot.
Oh, yes. Dual 6950's. My fault. And yeah, I've tried all the adapters, I've tried but DVI and VGA for my old monitor, since I've a converter for VGA. And yes. I'm using my newer monitor right now and it's coming out in perfect color.