Yes that was it.
Try if your computer will boot with only the C drive attached to the primary set as master, if so attach the other drive as primary master and see if that works.
If your PC still won't boot try with no drive attached and see if you can boot from a floppy, if so update the BIOS to the latest version.
Also check if your PCI bus clock is set to 1/4 of the FSB if it's 133 MHz and 1/3 of the FSB if it's 100 MHz this often can be set in the BIOS.
My case has so many fans that it hovers above the ground