Originally Posted by SoloCamo
So you are telling me that showing little to no HT use on the quad cores is a sign of proper HT utilization when the 8-core amd's are showing high usage on all 8 cores? Even bf3 MP (which loves threading) showed HT being a useful asset. For an example... go to page one of this thread.
poor performance on hyperthreaded intel cpu's does not necessarily mean there is special game code to use or not use hyperthreading. Windows has core parking and possibly other features which might affect performance of hyperthreads. But, as far as I know, there is no such thing as special game code to use hyperthreading.
Looking at cpu usage on page 1 of this thread, I see that the 8-core FX cpu is not fully utilized, while the 6-core FX is more fully utilized, and 4-core FX is almost fully utilized.
This indicates that this Crysis 3 benchmark does not process 8 threads simultaneously.
My guess is .... 4-6 core intel cpu's with hyperthreading appear to be underperforming because the game only uses approximately 4 cores (simultaneously). Hence, little or no benefit to turning on hyperthreading.
If crysis 3 only uses 4 cores, then why aren't more intel cpu's at the top?
Looking at the cpu benchmark charts, I see that cpu's with the most cache are near the top.
cpu's with the least cache are at the bottom. Perhaps crysis 3 runs better with more cpu cache memory?
Cpu usage on the core i3 (with hyperthreading) does look oddly low. The only explanations I can think of are: (1) core parking or (2) the game uses all the resources of each core and there are not enough resources left to use the hyperthreads .... not enough cache memory or (3) maybe they installed the "bulldozer core parking hotfitx" onto the intel systems. For AMD cpu's with modules, parking one core in each module may improve cpu performance. But for intel cpu's, it's probably better to either use default windows core parking or turn off core parking.
The big assumption in my reasoning is that these charts are accurate. If these charts are skewed and not fair, then my conclusions may be utterly wrong.Edited by Partol - 2/20/13 at 11:15pm