Use Crossfire for AMD RADEON 7970?

[M3t]

Is it better to enable or disable it, and should I use the beta drivers or not?

Thanks guys!

[M3t]

Just curious if crossfire is better for 2 radeon's for mining, or should I not even bother linking them together?

[camaro69327]

No need for Xfire..it slows hash rate..

For 7 series cards use 2.5 AMD APP. It is faster.

MY 6870 on AMD APP 2.8 gets 230 Mhash | On 2.5 APP it gets a steady 305
MY 7970 on APP 2.8 gets 560 Mhash   | on 2.5 it humms along at 700 + Mhash

Your mileage may vary...lol

[Gator-hex]

Dissable crossfire

I use 12.11beta, I've had nothing but problems with 13.x (I'm sure someone from Nvidia works in the AMD driver department!)

[M3t]

Okay, by disable do you mean disable in the software driver, or take the crossfire bridge physically off as well?

[M3t]

No need for Xfire..it slows hash rate..

For 7 series cards use 2.5 AMD APP. It is faster.

MY 6870 on AMD APP 2.8 gets 230 Mhash | On 2.5 APP it gets a steady 305
MY 7970 on APP 2.8 gets 560 Mhash   | on 2.5 it humms along at 700 + Mhash

Your mileage may vary...lol

What is 2.5 AMD APP?

[Equality]

does 11.12 catalyst drivers use AMD APP SDK 2.5?