I have a frined that wants to upgrade his CPU it's 7 years old hes running on windows xp pro. he has Compaq Evo N800c 1.4GHZ but he cant play few games b.c of the low GHZ so i told him il fine out for him. i did some searching on HP i only came up with.
Intel Mobile Pentium 4-M processor - 2.20GHz (Northwood, 400MHz front side bus, 512KB Level-2 cache, FC-PGA2, 478-pin)
A laptop that old really has no chance of playing modern games due to gpu, memory bandwith, and processor speed. The cost of the cpu plus the time and labor to install it, plus a memory upgrade in my opinion isnt justified.
only games he wants to play is online games. and there is this game where he needs more GHz. he dont play like fear cod 4 or any of them cd games. just online games like Cronous, Shoonline epicwarror etc