Crossfire-----

[dur_trix]

Can you crossfire a HD4850x2 and a HD 4870 together? BTW i have a asus m3a79-t delux MOBO

Soz this is going to be first crossfire system so im n00b with the crossfire part!!!

 

[RazberyBandit]

ATI says it will work: LINK.

While a 4850X2 w/ 4870 is a supported configuration, they recommend a 2nd 4850X2 or a 4850.

 

[Zenthar]

If you XFire a 4850x2 with a 4870, the 4870 will be "downgraded" to the speed of a 4850. In multi-gpu setups, all GPU will run at the lowest of their settings.