AMD Athlon 64 II X4 630 quad core 2.8ghz
ATI Radeon HD 5770 1GB
4GB DDR3 1333mhz
500w OCZ Stealth PSU
250gb Hitachi 7200rpm sataii HD
WIN7 Ultimate 64bit
Problem: no matter what game, and even video playback whenever there is prolonged (2-5 seconds) of "scrolling" the sceneary will jump / stutter / chop for a micro second.
For example I'm playing world of warcraft, I face a row of pillars, I run side to side with the camera facing the pillars and every few seconds there will be a slight jitter, like there are a few frames missing or something. This happens with or without vertical sync, with or without any video settings you can imagine.
Another example is I was watching an episode of family guy online, the camera moved through a room of people from left to right, facing them, and I noticed alot of stuttering/choppyness. Again only during these side scrolling moments, the rest of the animations are smooth as silk.
This has actually been a problem that has plagued me since building this machine. It was much, much more obvious with my old monitor, I bought a new monitor and the choppyness has reduced to a level where it's only noticeable during the side scrolling etc. I mean if I face a tree for example in counter strike, and strafe side to side, the tree will jump every so often in a way that appears to be skipping frames.
I've tried running fraps to record fps and see if there is corrilation, I mean sometimes with v-sync/triple buffering on there will be fps drops from 60 to 58/59 but there doesn't seem to be any link to the "skips".
I did have this same problem in my old machine (amd dual core, nvidia 9600gt) but that was using my old monitor which had a horrible response time which was more likely the problem. I am however using the same HD from that machine so maybe that's a possibilty.
Any ideas about this? Could you try strafing whilst facing motionless sceneary and see if you notice the same thing I describe?