CPU Multithreading please.

[rfxcasey]

Originally Posted by TonyD

+1. I could not do this on my previous rig as I was using DDR-II 1066 memory, which couldn’t run any faster than the default 533MHz. With the cpu at 4GHz, I had a nominal 5% increase in frame rate compared to that at the default 3.4GHz. My current memory manages 750MHz without any voltage mod, achieved by setting the bus speed to 225MHz (cpu at 3.825GHz). This 12.5% increase in the base clock results in an almost identical increase in frame rates.

This implies that an increase in cpu speed alone will not noticeably improve the frame rates in CloD, but an increase in the data through-put capability certainly does, at least on my system. Perhaps what this sim really needs is an Intel hexa-core with tri-channel memory, or even an Opteron FX with quad-channel memory …

And the ‘process affinity mask’ setting is no longer in the config file, not that fiddling with the settings yielded any gain in my case either.

I'd have to say it is more the fact that it is DDR3, you are presumably keeping the same timing scheme and increasing the FSB. The higher the clock speed memory runs at the typically looser timing scheme you'll have to use. If you can keep your same timing and increase the frequency you will notice some improvement. If you have a very good set of memory, which would allow for overclocking while keeping the same timing you should tighten the timing rather then overclock.

There is virtually no difference as show in numerous benchmarks between running for instance DDR2 at 400Mhz with 5,5,5,15 timing or 533Mhz at 5,6,6,18. The main advantage of DDR 3 is the in increase data path of 240 pins (not all of which are used for data) as apposed to 184 pin DDR 2. Couple that with increased bus width between say an AM2 to a AM3 or comparable intel processor comparison last generation to current and the performance increase is noticeable. But don't be fooled by the marketing hype that higher clock frequencies automatically translate into big or any performance gains.

The main thing to look at is the quality of the memory and how tight you can get the timing at any frequency. If you spare your memory the overclock and tighten up the timing as much as you can while maintaining stability, the benchmarks would and have shown that there is virtually no difference in gaming performance or otherwise. The overclock will only generate more heat and electrical stress for no gain when compared to the tighter timing scheme.

Originally Posted by TonyD

Hi Ned

I’ve always preferred Ati because of their more efficient approach (which typically results in better pricing), but few users would be aware or even care about the architecture of whatever card they may have, as long as it works OK.

The Nvidia GTX 560 ti outperforms the 6950 while using less power. http://www.hwcompare.com/8889/geforc...adeon-hd-6950/

[NedLynch]

Funny thing about the timing with my memory.

It is a 1600mhz memory, the motherboard of course defaults it at 1333. But in the SPD of the memory the timings for 1600 are tighter than for 1333, at least according to cpuid/cpu-z.

So with cpu fsb overclocking I also tighened the memory timings to the ones indicated by the 1600mhz SPD, though the memory is not running at 1600. It's running at 1500..ish, due to fsb frequency of 224 and starting out with the default of 1333.

Somewhere I read that AMD likes tighter timings anyway while Intel seems to be better with looser timings.

[desigabri]

hi,
here are some test I've done looking to understand what influences the IL2 COD performances:

These are the commons options for all test:

By desigabri at 2011-11-12
notes:
- The HD6950 is a 2GB version tweaked up to a HD6970
- The CPU is aircooled with an A70 Corsair (hardly fitted into the cabinet )
- DDR3 16GB Vengeance 1600Mhz
- no windows paging file
- Game loaded onto a 6GB ramdisk to slowdown the game loading times and the missions loading times (and ingame objects during the fly)
- Test made playing the "Black Death" Track and using the FPS SHOW START internal option
- Radio voice comunication OFF in audio menu settings

- Common game settings:

By desigabri at 2011-11-12

overclock 1:

By desigabri at 2011-11-12
this test seems to show that cpu overclock benefits ingame fps

overclock 2:

By desigabri at 2011-11-12
this test seems to comfirm the previus one and show how heavy is the shadows option

GPU overclock:

By desigabri at 2011-11-12
this one should show that GPU overclock doesn't help (???!)

affinity:

By desigabri at 2011-11-12
assigning processes to one, two, theree, four and six cores...
- See that starting from 2 cores and up, launcher.exe doesn't change performances.
- The best system seems to be a dual core processor that gets best results for FPS min.
- A one core CPU isn't able to play as the others

other settings:

By desigabri at 2011-11-12
you can't see here performance changes working on minor settings or trying to use priority process assignements

power boost:

By desigabri at 2011-11-12
same conclusion for catalyst boost settings

very low:

By desigabri at 2011-11-12
very low settings helps a lot for FPS results, anyway you can see that "effects" are very heavy here, also if setted to MEDIUM for FPS min

repeatable:

By desigabri at 2011-11-12
the last comparision is made only to see that comparing test made in different times but having the same options, get same results.

Before this test I believed it is more important the GPU overclok then the CPU overclock (for ArmA2 I got that conclusion). For IL2 CoD seems the opposite.

[diveplane]

code still needs a lot of attension for performance

sure they are hard at work for a big frame rate performance boost.