Overview of the problem Choppy/stuttering graphics and sound Full description of the problem and symptoms My sound crackles if there is any load on the system at all.. for instance if I have windows media player up and scroll up or down viewing a web page the music crackles and stutters. When playing almost any game (worst is COD4) the graphics are choppy and anytime there is a voice sound from the game it crackles, but the background sound is fine. Also, sound from another person talking in game is fine. I could live with the sound but the graphics issue has made COD4 vitually unplayable. Did it work normally at one time, or has the problem always existed? The computer worked normally for over a year after I built it before this problem arose. Is the problem consistent and repeatable, or entirely random, or semi-random? Consistent problem. I already tried these steps: I have updated all drivers, sound and graphics. I have set games to lowest possible setting and problem still persists. I have an LCD monitor and run at 1680 x 1050 My software: Windows Vista Ultimate x64 Eset Smart Security 4 My hardware Gigabyte GA-P35-DS3L motherboard Intel Core 2 Duo E6550 2.33 ghz CPU not OC'd EVGA GeForce 8800GT 512mb GPU 8 gig OCZ Reaper HPC DDR2 (1066) Cooler Master 500W PSU Other information that might be relevant I have defragged, ran windows update many times.. switched to my old ram, removed and tried ram in different positions. I stress tested GPU without any errors. I've done everything I can think of to solve this problem and could really use some help. Thanks! Oh, also just using the onboard sound, updated the drivers to the newest realtek HD audio driver.