Didnt expect so many replies, usually get one or two.
4745454b: Yes.. i was pretty baffled about it too. I dont know if CHOPPY would best describe it but what happens is.. its not really SUDDEN choppyness but constant unsmoothness. Im playing 100fps constant + 100hz (and so have been for 7 years of gaming) until i got my new pc last year. Not only do the games not look smooth, they dont feel smooth either. It feels like im having 150 ping but instead of ping causing it, hardware is. Its not software related at all (viruses, defrag, spyware, etc) because ive done over 13 reformats (just happened to reformat again yesterday). Ive tried 3 different GPUS and all the same.
If you wanna get specific on how "exactly" it FEELS like, ill explain it for each game, pretty much same symptom. Counter strike 1.6 : Recoil and shots are UNREASONABLY high and theres a delay before the shots are registered. For ex: i shoot an enemy 5 bullets to the chest, 1.5 seconds later, he dies. (been playing competitive for 5 years, it's not my lack of ability or knowledge or the game mechanics/netcode/etc). Quake 3 (same symptoms, shots seems to hit delayed, as if i had "150 ping" which in reality, ive tried playing with bots or 30 ping. Obviously playing offline eliminates a bit of the delay but its still noticeably abnormal. Warsow/Other dm's : same thing. Offline bots = delayed hit sounds and shots. Pretty much in all DM games i play, the hit sounds (beeps) are out of sync, it's not a sound problem either. It sounds like it's out of sync, and it actually IS out of sync, the bullets dont hit.
The weird thing is, it happens on my brothers rig as well. He runs a completely different setup, with an amd. Only similarities we have is : both running nvidia cards, win xp pro and dual cores.
It could have been coincidence but... i installed vista ultimate a few days ago and tried it, it ran perfectly smooth. It felt like my old amd single core, very smooth gaming. Unfortunately, my vid card fried a few days later so im not sure if it was coincidence or what. Although i did hear some people claim that vista made their gaming smoother, especially with dual cores and older games
WIN XP pro sp3
E6300 duo core stock
PNY 7600gs 512mb
ax400-PN fortron
ga-945p-s3Ive