I have a few G3 upgrades but one of them would usually freeze up during the boot process or immediately after. It's a Sonnet 450/1mb. I was tempted to toss it but I thought it may be useful as parts. Today I had my 8600/300 out and thought I'd try the card. It seems to work fine with this one machine, even ran at 500mhz until I installed the Sonnet software. Anyone heard of G3 cards that only run in Mach 5 machines?