the motherboard you are referring to is the TA-082 motherboard. this is usually on the 2.71 firmware model of the psp. if u get the box with it you can check what firmware and motherboard you have by checking the box, look at this link to show how how to check
http://www.pspmod.com/forums/showthr...82+motherboard (4g memory)
CREDIT TO THE BEGGINNER FOR THIS POST
also, i suggest you try to get a psp without this motherboard as it would be easier to downgrade, also try to get a psp with a low firmware for example firmware 2.00 as these have lower security for homebrewing