Thanks, I know it's a bit old, but if I can get one dirt cheap it's the simplest way for me to give my son's pc a bit of a boost...
The SL6S5 you mention is a 3.067G cpu, not 3.4G. The 3.4 won't work according to the list at the Gigabyte link I posted. (no support for 800 FSB).
There it just mentions the P4-Northwood 3.06G (HT) 533 FSB without giving the exact model numbers. I know the motherboard can be a pit picky. Hence my question.
Cheers, Nick