Try some of the system boost recommendations in the AH DX8 Beta forum.
I know I posted a few just recently.
What are you running? I have a C466 w/ V5 5500 392MB PC100 SDRAM SB Live! 1024 and 30GB 7200RPM Maxtor, still runs "good" enough for me. Although prolly getting close to upgrade time after this release.
-SW