PCI Latency timing is the cure. Its just finding the right timing that is hard.
The other issue is RAM settings. On my Asus P4PE with DDR333 ram i always ran in turbo mode, the fix was just putting it to normal (not a big difference is memory speed so not sure why i had it on turbo to begin with). It happens with different chip sets, Nvidia seem to be the worse though.

One reason Creative does not want to put out PCI-E cards cause of increased latency problems.