Very slow game speed Options

[Shadan]

I am planning to play an another BG2 run while we are wating for v6 release, but I have one serious problem. In all of my BG2 games (was 3 of them with IA) I experienced a very slow game speed in certain situations.
1. When there were lot of enemies and/or corpses on the screen (like githayanki suprem leader fight).
2. When there were many spellanimation on the screen (like SI, Mirror Image, GoI, Spell Turning etc.).
3. When I fought against big monsters (like any dragon).

It was very frustrating sometimes. First I thought it is because I have some mods (like bottomless Bag of Holding), but later I had only IA and The Four installed after ToB patch, Baldurash and EoU, and I dind't have bottomless Bag of Holding at this time. Despite this clean and modfree IA install, I had very slow battles still. My computer is not the newest, but I have 2 giga memory and I can play all games, even WoW without any difficulty. Can anyone give some advices how can I avoid this slow speed in BG2?
Ah, I played in 1024*768 resolution, but I tried in 800*600 also to check if this could be a problem.

[critto]

Well, speaking from experience, Infinity games performance sometimes poses a certain problem on the modern hardware.
For example, on my main PC (p4-1.7 GHz, 1.5GB Ram, GeForce 6600 GT 128 Mb) with every last one of the Infinity games I always experience some kind of performance problems, Usually in situations similar to those you have described: large critters (like dragons), lots of spell animations and such.
So the solution here is to play with video settings of the game itself, try to search for the older video drivers (what's your video card, by the way?), disable Direct3D and DirectDraw acceleration (allowing the game itself to manage these things). Personally, I would recommend to go for the older drivers. I have managed to find them myself some time ago, but when I tried to do that again lately, I have met no luck.
So that is why I always play BG2 and other Infinity games on my laptop. It has quite enough resources in terms of memory and processor speed, but low-end radeon videocard, so BG2 runs very smoothly on it.