AMD 7990

[Hammerhead]

i just updated my Signature for my rig specs. i have not run a 9750. i was running a Sapphire 7870 before i upgraded(also a very nice card). but most people on the forum say the 7950 can be overclocked to run in the same crowd as a 7970 stock. in my opinion though i would rather no OC a card to the max to equal another card, i prefer running a cool set up just cause i am cautious and  i have a monster Onkyo HT receiver i run my rig through that is like a freakin' space heater so i like to keep the heat down in my gaming room.

[Hammerhead]

also im assuming you are not worried about Power, if you are looking into the 7990. the 7970 uses roughly 50 watts more than the 7950 at full load. but i found this link for you has some decent points http://www.tomshardware.com/forum/390572-33-7950-7970

 

I am pretty sure these are reference card they are comparing. i am running a dual x cooled no reference setup because i am not planning on watter cooling my GPU