Originally Posted by Usario
This talk of what constitutes a core never gets anywhere at all.
BD scales something like 6-6.5x. i7 4C scales around 5-5.5x. i7 6C scales around 7.5-8x. i5 4C scales around 3.5-4x. Phenom II X6 scales around 5.5-6x. Point: no CPU with SMT or CMT will see multithread scaling too close to the actual physical core count. Arguing over how many cores BD really has, or how BD should be able to get the same results with half the cores to be competitive, is pointless.
this is true, but Incorrect for the MP scoring of FX
When ever you run cinebenches single thread on FX you use full 4 way front end and L2 cache. so that's only 4 full cores like at any given time.
when you run up to 4 cores your doing that, but beyond 4 threads it's different
you must load the other core in the module to get the right Multi core scaling while running single thread.
by running something heavy on the other core in the module like intelburntest you can get a Mp scalling above 8.0 but you'll see drop in single core speed about 33% from my own work. since it splits from 4 way to 2 way for both cores, and splits the L2 cache up too.
I'm going to post a pic with this to show you
I was running IBT and cinebench 11.5r on one module here each on different cores with in the module.
(I'm not good with making click-able lol)
red box you can see the drop in single thread and MP ratio above 8.0
yellow box you can see when after cinebench finished the jump in FPU GFlops too.Edited by Demonkev666 - 10/21/12 at 6:12am