View Full Version : Dual Core CPU Utilization in 81.85

10-19-05, 06:05 AM

I have updated to the latest 81.85. Much better than the previous 81.84 which used 100% Dual Core cpu.

This new release seems to eat only a little into the second core. 53% Cpu usage I have noticed in CS Source.

I got my fps improvement too. 129fps in CSS Bench, it use to be 117fps.

What cpu usage are your games now (Dual Core + 81.85 only thanks).

I like these new drivers!


10-19-05, 06:14 AM
Fear was using up to 85% cpu with 81.85 64-bit here.
I didn't run any benches except for the FEAR settings test in which I gained about 5fps, but the overall gameplay was smoother with 78.03 for me. I was getting some hitching here and there with 81.85 but with 78.03 I only got it during save points. I switched back to 78.03 for now but I'll probably check out 81.85 again for Source games eventually and see how it goes.

10-19-05, 06:49 AM
I turned off /usepmtimer in boot.ini
and 81.85 is quite smooth for CS Source...
before I tried 81.84 with /usepmtimer ON

i am unsure, we need more feedback about dual core cpu usage, and performance increase....

I have a feeling it wont increase much since its only using 55% of my 2 cpu's

10-19-05, 10:21 AM
Has anyone else noticed any sort of performance increase on dual-core Intel CPU's? So far all those reporting a gain seem to be using AMD systems.

On my Dual Hyperthreaded Xeon 3.4 I am not noticing any performance increase with the 80.xx drivers. Checking my performance log, it shows very little activity on my third and forth processors. Are the multi-threaded drivers only for SLI systems or 7800+ series of cards?

10-19-05, 11:53 AM
I dont believe that the drivers use hyperthreading as another cpu since it isnt, its just a virtual cpu.

I am still using the 81.84s and dont see a reason to change to 81.85 yet. Ive only been playing WoW lately, but I get around 56% cpu utilization in the busiest of encounters such as molten core.

10-19-05, 07:51 PM
yep thats correct since it will most likely read CPU id, instead of looking at logical processors

10-19-05, 11:11 PM
Hmm, I tried disabling hyperthreading on my Xeons, and the new drivers don't seem to be using the second CPU. In fact, my benchmark score dropped considerably with Hyperthreading disabled.

I wish there was an option to enable and disable the multi-core CPU optimizations so that one could see if there is any difference, and also to avoid any potential software conflicts (ie. 3DSMax)

10-20-05, 12:22 AM
just play World of Warcraft youll be happy like me ! :D :cool: