Quoted from Tyan's Web site
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Why does my AMD system get a NMI/Parity Error blue screen when I apply the Nvidia Detonator 23.11 drivers?
This particular error occurs in combination with:

1) Nvidia's latest Detonator XP v.23.11 drivers
2) Geforce 3 family of video cards
3) AMD's AGP drivers

If all 3 of these listed items are used in conjunction with any AMD 760 chipset motherboard you will receive this error. Most video card manufacturers modify the drivers for their cards. Therefore, if you use the video card manufacturer's drivers or Nvidia Detonator v.22.xx drivers (or earlier versions) you will not encounter this error message.