Thanks for the great post. +rep, and +vote for sticky.
I have a question though, because according to your calculations, my computer is seriously underperforming. I've got a Q9300 overclocked at 3.375GHz, and my ram is at 840MHz DDR2. FSB: DRAM Ratio = 450:420 (15:14)
Now, if I follow your formula, the calculation is 3.375 x 16, which equals 54.
So in theory, I should achieve at least 50GFlops.
In practice, it varies between 27 and 30.5.
So obviously there's something wrong, but is it because my overclock is bad or simply because I'm not running IBT properly? Normally, I kill most processes I don't need (even explorer.exe!), run a Free Memory program, then run IBT for about 20 seconds before stopping the test. Within 10 seconds, IBT reports how much free RAM I have so I choose Maximum and let it run its course.
I disabled the page file, but it's made absolutely no difference. After disabling, I rebooted and ran it. I was only getting 8GFlops! I rebooted again and it came back up to 29.7GFlops, but that's only slightly over half of what I should be getting.
According to your calculation and Intel's Documentation (http://www.intel.com/support/process.../cs-023143.htm
) I should be getting 40GFlops at stock. I brought the machine back down to stop and I'm only getting 26.7GFlops. What the hell is up with that?Edited by [Adz] - 2/8/10 at 12:48pm