Quote Originally Posted by XRL8 View Post
....
However if lets say retail BD is able to hit 5ghz stable 24/7 and Sandy is the same at this moment.Its ok, but not as good as i hoped.Its pretty much certain IPC of sandy is higher, so BD needs more clock.
I was under impression SB`s arent really hitting 5ghz fully stable, all i saw was cpuz screens, or 3dmark runs (thats on air).But you prolly know better.I didnt had the opportunity to build SB system yet.
I might take it wrong but are you hoping to hit 5GHz on 8 cores stable for them to sit idle and run single threaded workloads to allow SB outperform it?
I agree SB ST performance most likely will be higher at the same clock than BD's, but BD strength should be MT. AMD focus for BD is on MT and scalability.

I see it like this:
if BD really can hit 4.8-5.x GHz on AIR stable for all 8 cores under load then it's great and will have amazing performance in MT. Scaling 8 cores to that speed is harder than 4. Just look at Intels SB vs Gulf. 6 core monster scales up to 4.4-4.6GHz on AIR.
When ST performance is your goal I bet you can squeeze extra few hundred MHz out of BD max MT clock.