Right.... iv recently installed vista ultimate and I'm very addicted to Garry's mod at the moment BUT, On some maps my fps will randomly shoot down to less than 10FPS and when I look in a different direction or at the ground it will shoot back up again, I'm running a 8800GTX so it's not lack of graphics power I was just wondering if anyone has had or got this problem. My GFX drivers are the latest and Garry's mod is up to date. I'm thinking it's a simple compatibility problem that will be fixed with upcoming drivers and updates, I was just curious as to weather I'm not alone! Also if anyone is having this problem with any other games please let me know especially games such as CS: Source and half-life 2/episode 1 seen as they run on the same engine. Thanks for any help