Core i7 Hyperthreading hurting performance in games??

[Hornet331]

I recently found out that there is speculation that 8 cores of the Core i7 may actually be hurting game performance and that turning hyperthreading off actually helps performance in some games.

Link:
http://vr-zone.com/articles/does-cor....html?doc=6160


Are games just not optimised to run on more than 4 cores? Is it the OS (Vista 64)?
Anyone with knowledge on this subject help out?

I noticed some odd behaviour in TF2, when i use HT and have 8 core enabled it theres sometimes a bit stuttering, if all the 8 cores are loaded in the background (boinc) it becomes more noticable.

BUT if i set affinity for TF2/HL2 only to 4 core or less its smooth as a baby butt.

Imho thats either a problem of the OS (using vista ultimate 64) or TF2 itself, that has problems. I dont notices such behaviour in crysis or L4D, but that dont surprises me much, cause L4D uses a new HL2 engien which supports multithreading much better then the "older" TF2 engien.

Btw. i wouldn't be surprised if you would get the same performance, when you set the affinity for games to 4 cores (even with HT enabled) and you would get the same score as with HT disabled.