I tried to turn HT off and experienced nasty problems when running engine on all 6 physical cores.
Every 4-5 moves the Win7 would assign all 6 threads to just 1 core!
I noticed this because Nebula's NPS and depth reached would drop significantly from time to time (NPS would go from 3M to 50K).
Not sure if this is bug in Win7 or my motherboard driver issue, but testers should be aware of this and check their games to see if they have this issue.
Cheers,
Dragan
Problem with Win7 and turning HT off
Moderator: Ras