Pike

Okay, I tested almost every tweak I found in quite a lot forums (such as changing doomconfig.cfg values, unpacking pak000 and changing the shader settings, letting WinXP manage my cache, seting it manually, turning fast write off/on, setting AGP speed to 8x/4x, underclocking the radeon), but nothing seems to solve my problem. The game runs a few fps faster now, but I never complained about that. I also think it must be a cache problem, it's just strange nobody else experiences these lags. Oh, i almost forgot: I waited quite a while after the framerate dropped and played on -quite a pain though, having firefights with 2fps!- but nothing changed, the framerate only gets 'normal' again after restarting the game.

Make sure the drivers really are 4.7- everything under that version caused my doom 3 to crash after a few minutes, too! Who knows- maybe my problem is related to the rather old 4.7 drivers,too- could you try to install 4.8 or 4.9 beta drivers since you don't have a notebook and report what happens? I would do it myself- but with a mobility radeon you have to be glad there are Omega -or other 3rd party- drivers- if I would use my system manufacturer's drivers, I think Doom 3 wouldn't run at all!

I already thought of memory leaks, but I think the drop in framerates appears much too suddenly and is much too significant (from 30 fps to 1 just after walking through a door). I just came to a point in the game, where you can switch between security cams on a monitor- and the areas I visited before were OK, only when showing the camera positions I hadn't been before, the fps dropped to 1 fps again. Underclocking the Radeon didn't help either, but thanks nonetheless for your help so far!

Until now, the Omega drivers ran perfectly with every game (Far Cry, etc...), I upgraded from 4.3 Omega drivers to 4.7 when Doom 3 crashed after some minutes of gameplay, and now my only problem is the one explained above.. I would try normal ATI Catalyst drivers, but is there a safe method to run a mobility radeon 9600 with these 'normal' drivers?

Okay, first of all my basic system specs: Notebook; AMD Mobile 2,6GHz ; ATI 9600 (64MB)-newest Omega Drivers (Based on Cat 4.7) ; 512MBDDRRAM While i know the Ati with only 64 mb could be a problem I tried 'high' graphics settings with a resolution of 1024x748- and, what should I say: It runs well for me- most of the time I'm playing at around 20 to 40 fps. After some 15 to 20 mins of playing, however, when I open a door the framerate suddenly drops to 1 or 2 fps and stays there. I have to exit the game and after restarting (not rebooting the PC!) everything is fine again for a time. I would tone down the settings a bit, but -as I said: The game runs -and looks!- perfectly fine the first 15 minutes. Isn't there a possibility tohave the game kick some memory free from time to time while playing it? Any help would be appreciated- thanks in advance!