Old Intel P4 socket 478 CPU upgrade question !!!

Hi guys. I have an old Asus P4 socket 478 motherboard and i'm planning to do an upgrade for the CPU. My current CPU is a Intel Pentium 4 2.6mhz single core. I found a 3.0mhz CPU on Newegg.com and im wondering if it compatible with my motherboard.

Here's the CPU that i'm looking at : http://www.newegg.com/Product/Prod [...] 6819116027

btw what's bus speed ? I checked my motherboard spec and it said my CPU socket front side bus speed is 533/400 mhz but the speed on that Prescott 3.0mhz CPU is 800 mhz. Does that mean it's too fast for my socket configuration ?

The reason im upgrading is because i think my current 2.6mhz CPU is bottlenecking my Radeon x1950 pro agp 8x. I just want to keep this old system for a little bit longer. This will be my last upgrade until i can save up enough money for a brand new system in the futre.

So do you think that CPU will work on my motherboard ?

We can not tell, for certain, without knowing what mobo you actually have. You can usually find the Asus model and rev by looking between the bottom two PCI slots.
I would guess that your board probably wont support prescott chips. They require a lot more power than the old northwood chips.
It isn't much of an upgrade anyhow. While the prescott runs faster, and has more cache, it has a lot more pipelines, which tend to ofset the other gains.

I used to own the same cpu as yours. And bad news is, the new cpu wont fit in your current socket!! If your gpu is also aging, I recommend to do a cpu+mobo+ram upgrade. I know your short of cash. But amd offers a good upgrade path for around 150$. You will also get more money if you sell a mobo+cpu+ram combo instead of selling them one by one. Lets say you get 50$ for these parts. So you would need 100$ for your upgrade. Heres what I recommend you:
AMD 780G mobo(get the cheapest one from a reputed company) Eg: the gigabyte mobos are going for around 80$
AMD 4200+ X2 should be around 50$
Ram you can find easily for around 20$ DDR2 1GB stick 667Mhz
Anybody with a better help for this guy?? I think this is pretty decent build.

wouldnt spend a cent on old P4's!

have a look at the Asrock 4CoreDual-SATA2 motherboard -perhaps if your short for cash you could pick up one and a new cpu and for now use your old stuff till you can afford to upgrade the rest, even a lowly Intel E2140 would blow the doors off your current system, even a 420m or Celeron E1200.

BTW and ASUS motherboard with the 800 in the name supports prescott cpus (P4S800, P4P800 series etc)

I am in the same position, How did you get on with the Mobo change.? I have just done a barebones with a E2220 Oh what a difference, guess the answer is junk the old Mobo and install a bb motherboard, Oh well!