I have a pc p4 running asrock socket type 478 i have another pc optiplex 320 core2duo what i want to do is sell my asrock mother board and buy a new mother board that would allow me to overclock. i believe the socket type for the dell is 775, so i can js take the cpu and ram out of the dell pc and put it on my pc with the new motherboard. any suggestions? a quick look into motherboards told me prices are at roughly £30. but i am not sure which one i should go for?
What he said. Assuming you've been using this computer all along, you've got a fair amount of mileage out of the system. What you are suggesting is spending £30+ on a motherboard to overclock for what may amount to be a minuscule amount of performance gain. At this point, if you want a step up in performance, it would be best to use: an Intel Celeron G530 Dual Core (2.4Ghz, LGA 1155) for £35 + Gigabyte SKT-1155 H61M-S2PV mATX for £40 + a pair of Corsair VS2GB1333D3 2GB Value RAM for £11.50 each + salvage other parts from your original build. For under £100, you would get several magnitudes more performance by stepping up to 1155. Contrarily, going to the effort of taking a computer apart, spending £30+ on a motherboard to overclock for what may amount to a small gain seems counterintuitive.
Unless you were actually born in 2000 and are 11 or 12 years old (inferred from your username, no offence intended) then you will need to save a few pennies to buy a new system. Unless you're just using it for browsing/basic office work, in which case use what you have until it breaks. A modern super budget system can be built for under £200. You can build something quite impressive for gaming etc for less than £500. Sometimes it's best to just cut your losses and move on - frankenstein PCs made of old, rejected parts are always a disappointing headache.