I've received significant FPS improvement AND less memory usage within EQ2 by installing
GeForce Release 175
This link is ONLY good for the below spec's. If you have a different version, go to nvidia's website and get the ones for your machine.
Code:
NVIDIA Driver Downloads
GeForce Release 175 WHQL
Version: 175.16
Release Date: May 16, 2008
Operating System: Windows Vista 32-bit
Language: U.S. English
File Size: 36.2 MB
I am running around with high visual settings (minus particles because they bother me and shadows due to having multi core) and receive much better frame rates.
The memory usage for eq2 is now ~800mb instead of the 1.4+ gig.
I would suggest at least to check them out =)