How do I figure out what socket my Pentium M is?

[greigmg]

I want to upgrade my processor but for the life of me I can't figure out where 479 starts and 478 stops. Everyone tells me the P-M 755 (socket 478) is the one I should get (as opposed to the 760 which is 479). For a while I was thinking "ok, 478 must be the 400mhz FSB and 479 be the 533mhz FSB," but now I'm not so sure.

When I ran CPUID on my existing 1.4ghz (400mhz FSB) P-M, I come up with this:

Name: Intel Pentium M
Code Name: Banias
Brand ID: 22
Package: mPGA-479M
Technology: 0.13u
Voltage: 0.956v

Can anyone tell me what that sequence by "package" means - what does the 479 represent there? And just what is the difference between sockets 478 and 479?

btw, Intel's website is a mess for getting info about their processors. Thanks for the help.

 

[firewolfsm]

478 is for older P4s, 479 is the current and only P-M socket there is...i don't know where you found a 478 P-M.

 

[greigmg]

Here's one right here:

Pentium M 755 Socket 478 at Newegg

This is the one everyone tells me is right for my computer, but see original post.

 

[greigmg]

quick bump, I know someone around here knows the answer. Thanks again.

 

[Mingon]

All pentium M's have only 478 pins, the mobo's meanwhile have 479 holes. As one is in a different place you cannot physically put it into a P4 478 board.

 

[greigmg]

Ah, gotcha. That's what I started to suspect, I finally had time to search around on google today and they use the 478/479 a bit loosely in some places. Looks like it's a 755 for me.