Quote Originally Posted by L7R View Post
I bet thats because using different motherboards. I have had many differences in crossfire scaling between different boards. I have seen Gigabyte boards gives most coherent results between different games. MSI and asus may be great on some game but not so consistent between different games.

One intresting thing what you find in some gigabyte mobos is extra molex socket in pcb just for crossfire use! I was little surprised and wondering what the heck is that for.
What you say makes little sense to me, as most that changes is some internal chipset latency, which will never have more than a FPS or two impact in games. Multi-gpu this may havea slightly larger impact..maybe double..but not more than that.

The extra socket is to provide power directly to pci-e slots, eliminating extra electrical noise in the pcb. But now that cards are getting higher-draw, this socket is disappearing, as the 24-pin mobo connector went up from 20 to provide the extra power anyway.