Hello all,Someone had posted that if your CPU has Hyper-Threading Technology, and if you have Hyper-Threading activated via your BIOS,

I noticed the same results on my 3.2 GHz P4 CPU. Performance decreased if I set affinity to only one CPU, on order of 4-5 fps in high density scenery areas with heavy clouds.

Of course, it didn't stay at only 15-17 but moved from that bottom back up in FPS counts, but nowhere near the locked 30 FPS that not playing with the AFFINITY tab gave me. The bottom line, was as you saw yourself, there was degredation of the FPS displayed.I'm going to let Intel and their Hyper-Threading handle the rig, LOL! Sometimes we play around too much for our own good, myself included!Cheers!Mitch R.

Setting FS9 to use CPU0 or CPU1 isn't what caused the large increase in FPS that some people saw. In reality it was a glitch in an addon program (I forget which) that was drastically decreasing fps. Setting CPU affinity cured this problem and hence the increased FPS. If you didn't have this defective addon, which has since been fixed, then setting CPU affinity generally didn't boost FPS.David

In the "read me first" of Flight Simulator tips and tricks post #233 and #234.