OK video gurus......in a Crossfire setup using 3870 cards....what would happen if....

[Jessica69]

Crossfire setup using 3870 video cards...both from same manufacturer.

One is a "standard" 3870 with core clock of 775 and memory clock of 2250.

The other card is an "overclocked" card with a core clock of 850 and memory clock of 2280.

Would this make a difference Crossfiring the two, or would the "faster" card just downclock to match the "slower" of the two cards?

 

[Piuc2020]

I do know that they will indeed work with each other just fine (and they won't over or under clock), I'm still not sure if there is a performance benefit from having different clocked cards and more specifically if it causes even more trouble with AFR concerning timing issues and micro-stutter.

Maybe someone can enlighten us, what's the point of asynchronous clocks on an AFR CF rig?

 

[Sylvanas]

As of Catalyst 8.2 you can clock any 2xxx and 3xxx cards individually when in Xfire. As for AFR- nobody has really looked into it but it's not going to be a problem.