What resolution and settings are you running SE5 a

[Matryx]

The last time I heard of massive mouse-lag like this (on my brother's computer) the graphics-card was forcing anti-aliasing. Might be worth double/triple-checking all the ways your card can do that.


In answer to your question - I run an athalon xp 3200+ (2.4ghz) with 1.5GB ram and an ATI Radeon 9800xt - using windowed mode on a native 1280x1024 desktop so I can IRC on my other monitor over there <----