Might be a ram problem.Check for special settings for WinMe and 1GB ram. I know
W98 needs a teak or two to utilise more than 512.

I removed current graphics card driver before installing, updated
Motherboard drivers (Via) and then installed card as per manufacturers
guide lines.

Went into 3D game (Planetside - On-line multiplayer 1st person
shooter) and within 3 mins it crashed to desk top.

So - removed drivers and card and reverted back to original card that
was working. That now crashes too