Howdy folks, I'm an old man ands not nearly as informed as most of you guys. Anyway, in the last post it was said that you can not hybrid CF a 4850. That conflicts with the information I received from AMD and Gigabyte. I just assembled this new computer (and it doesn't come close to the beasts that I see on this site) and I'm moving away from SLI. No real reason other than to try things. I have the 790 chipset and onboard graphics. The onboard is ATI HD 3300. I have an Asus 4870 on the way. I was told by Gigabyte that I can run hybrid crossfire. Two things come to mind though. One is a general rule of life that if you combine something of great quality with something of low quality, more often you denigrate the higher quality rather than raise the lower by the boot-straps. The other thing is common sense and has already been brought up. That is the analogy of putting a lawn mower engine on your Harley. It's just not going to go any faster. Anyway, I just don't know. I really just wanted to pass on what I was told. You do not have to match chipsets like you do with SLI. But, having an inquisitive nature, now I have to know. My Dark Knight should ride in any day now. I was just going to disable the onboard graphics, but now I have to try the hybrid crosfire. Darn you guys!!!! Ha! Ha! I will let you folks know if it works and how it works. Take care, Brad Haskin