look I can only confirm what the manufacturer designed it to be use by what hardware, we all know 775 is flexible up to the point of the TDP of the motherboard
* puts detective hat on and explains himself while smoking a pipe.*
Intel Pentium 4 Prescott as per wiki :
https://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors
a series of processors that are between 84-89W, therefore I will assume the motherboard was assume to handle 95w.
The q6600 has a TDP of 105w and I would not recommend it for this board.
the Q9650 and Q9400 has a TDP of 95W and could be used.
the Q8400 have a TDP 65W and safest choice.
on ebay all of these are anywhere between 20-75$ on average
Performance wise:
I...