Sorry for the delay, my DSL was out all weekend. Thanks for all the advice and suggestions - it helps.
Motherboard: Tyan Thunderbolt S1837UANG / 440GX / AGP 2X AMI Bios Version V2.00.09 -- Windows 98 SE 4.10.2222 A -- Pentium III 500Mhz -- 128Mb -- Creative PCI Live Audio Card
My symptoms are the ELSA Gladaic runs in standard VGA mode fine (whoopiee), I speculate drivers not having enabled the GF2, but as soon as I install GF2 drivers the board hangs during the boot process, during the W98SE spash screen. During a stepwise boot process the last thing displayed is starting ASPIENUM.VXD.
It's not ASPIENUM.VXD. If I don't execute it, the sysytem still hangs. Sometimes I get a "Windows Protection Error" error message when I hit a function key.
Does this sound like a current problem?
All that the Tyan web site says is: "The GeForce DDR video card is not compatible with this motherboard". This was posted in March 2000.
I does not address the GF2 GTS version. Tyan has not responded to my several email inquiries (well over a week).
I've tried removing or disabling everything possible, a clean W98SE install, disconnecting the onboard GF2 fan, updating the mobo BIOS, installing the lates 440GX drivers, and trying the lastest ELSA and nvidia drivers without success.