I got an ABIT Siluro/ Geforce 2 MX400 after that and Diablo 2 ran worse, the frame rate tanked. I was gutted.
Back in the day I tried to play Morrowind but every time I moved my mouse the game would crash, I started removing hardware until I found out it was my soundcard giving me issues, was an old ISA slot. Got a PCI soundcard after that and no issues.