I am putting my wife's K6-2/400 on a Micro-Star MS 5169 form a PCchips m598 which has an onboard video and sound.
She plays non demanding games, mostly the ones for the small grandchildern and scrabble. She does have Indipendence War and Shock.
These are the boards I am looking at.
ATI Rage Fury 32mb $90
Asus V 7100 GEforce 2 MX 32mb $114
Creative Labs 3D Blaster TNT2 32mb $77


KT7-Raid W/800 T-Bird, 192MB RAM
Raid 0 WD 20GB ATA66 & Samsung 6.5GB ATA33
Diamond Viper V550 AGP
Sound Blaster Live
Adaptec AVA 2906 SCSI
US Robotics 56K Voice