GeForce GTX680 AMD Radeon equivalent?

[Ver0x]

So, what would be the GeForce GTX680 equivalent AMD Radeon graphics card? In terms of performance, not price.

 

[ScopeThaGecko-1282653]

The HD 7970 and the R9 280X are the GTX 680/GTX770 equivalent.

 

[Ver0x]

The HD 7970 and the R9 280X are the GTX 680/GTX770 equivalent.

Thanks.