AMD updates Radeon HD 7950 spec
Anti-GeForce GTX 660 Ti measures
The file will boost the HD 7950’s GPU from the current 800MHz to 850MHz. It will bring PowerTune with Boost that will ensure the GPU overclocks up to 925MHz depending on the graphics requirements.
Being a BIOS update, the actual physical specs will remain the same. The company seems to have decided against overclocking the memory so you can expect it to remain at 1250MHz.
So, the “new” HD 7950 is expected to ship from mid-August, priced the same as the “old” card. Users can update their existing reference HD 7950s, but of course, at their own risk.
More here.