Originally Posted by rio
...Ham, do you now believe that my CPU is the bottleneck?....
Yes, I now believe that is the case. I must admit I am very surprised.
While I was certainly aware of the part the CPU plays, in this, and other benchmarks, I always believed that the major role was that of the GPU, with any modern state of the art CPU, having an effect of about 10% to 15%.
I now see that the CPU's role, is significantly more.
I've attached 3 screenshots below.
The GTX 460 was disabled. Only the 580 cards were used, and only because you are also running dual GPUs. The characteristics of the 580 cards remained the same throughout all the runs, they were never touched. Only the operating characteristics of the CPU was changed for each run.
For the first run, you can see that I severely crippled the CPU, by completely disabling Hyper-Threading, as well as shutting down 2 cores. This left me with a basic 4 core, threadless processor, as close to yours as I could get. I noticed that you were over clocked to 4.3GHz, so I dropped mine down to 4.2GHz. My score was P36510
vs. your P40923. The 4,000 to 5,000 point variance is about what I'd expect.
Next, I opened all 6 cores, but kept Hyper-Threading shut down. The still crippled i7 3930k, allowed a score of P42701
. That huge increase in score was a surprise!
Finally, I enabled Hyper-Threading, which now allowed the CPU to operate to it's full design capabilities, which produced a score of P45697
! A full 9,187 point variance from the original P36510, simply by changing the characteristics of the CPU! Pretty amazing stuff.
This proved to me that the CPU plays a far greater role in these benchmarks than I originally thought, and yes, you are correct, about the i5 3570k bottlenecking your score.
However, putting all the benchmarking aside, and getting into the real world of every day use, these numbers don't matter very much, because that 690 will rip through anything you throw at it for sometime to come.