does anyone know if you can replace a 1.8GHz cpu 478 socket with a 2.4GHz xu1 socket(not changed a processor before) or if anyone knows a website with socket info I would be obliged both are zif sockets also if changing the cpu will XP need to be reregistered and how complicated is this procedure thanks for taking the time to read this
Looking at MSI website, click here you can upgrade to a 2.6Ghz but because your system bus is only 400 it will not accept hyperthreading. I suggest purchasing another montherboard and P4 2.4Ghz/800 c model with is HT enabled.
As pointed out by ThePharcyde007, your motherboard can only take CPU with 400MHz FSB (Front Side Bus) frequency.
It is not easy to find any high frequency Pentium 4 CPU now. However, all Pentium 4 Celeron CPUs are 400 FSB, a 2.6GHz Celeron costs £55 click here. If your CPU is also Celeron one, you can gain performance by upgrade. But, if your CPU is Pentium 4, then there is no point to upgrade.
For cheap and fast option, I suggest you to upgrade both mb and AMD cpu. For example, Athlon XP2600 / 256Mb DDR / Motherboard Kit cost £135 click here which is about the same price as a Intel P4 2.8GHz CPU. Of course Intel one is faster, but not much.