R32 Pentium M > Centrino?

Message

tkxmoe · #1 Post by **tkxmoe** » Thu Sep 20, 2007 8:03 pm

Would i be able to put in my T40 Centrino 1.5 Chip into my IBM R32? They are both 400fsb versions.

The Spirit of X21 · #2 Post by **The Spirit of X21** » Fri Sep 21, 2007 12:27 am

That's a great question, and I've been trying to sort the details out myself. It seems that there were Celeron M versions of both the Banias and Dothan Pentium Ms. Both are Socket 478 with 400 MHz FSB, and it would seem that they could be exchanged.

There were also Pentium 4-M processors were also available as 400 MHz FSB and Socket 478. This would indicate that they could potentially be swapped for a Pentium M, though I am even more hesitant to say that than I am with the Celerons because the P4-M uses an entirely different architecture, whereas the Celerons use the same core of their contemporaneous Pentium Ms, though with half the L2 cache and no SpeedStep technology.

Could someone more knowledgeable shed some light on this? This is rattling my brain....

#3 Post by **AlphaKilo470** » Fri Sep 21, 2007 1:22 am

You should be able to upgrade the Pentium M chip in an R32 using the Pentium M. However, the P4-m R32s will not work with a P-M and vice versa. The sockets might be the same but electrically, they are different.

cirthix · #4 Post by **cirthix** » Sun Sep 23, 2007 4:30 am

p4 and p-m are completely different. they are actually compatible in terms of busses, but the socket laout makes them incompatible with each other without an adapter (asus made one, the ct479, but it only works in some boards, and wouldn't fit in a laptop).

you should be able to swap them, if they're both socketed versions. some (i know the x series is) laptops use bga chips, and you can't remove those without desoldering them.

#5 Post by **underclocker** » Sun Sep 23, 2007 8:18 pm

The only possible way to upgrade an R32 to a Pentium M is to swap out the motherboard with a Pentium-M based R40 - if it fits.

I recall the R30/R31/R32/R40 were all similar sizes, but I really doubt this is possible.

Bottom line, Pentium 4M based machines can not be upgraded to Pentium M by just a CPU swap. The pinouts on the CPUs are quite different - among several other reasons.

The Spirit of X21 · #6 Post by **The Spirit of X21** » Mon Sep 24, 2007 12:49 am

OK. Let's see if I have this straight - the Pentium 4-M and the Pentium M were available as Socket 478, but the pins on the sockets were arranged differently?

#7 Post by **underclocker** » Mon Sep 24, 2007 3:32 pm

The Spirit of X21 wrote:OK. Let's see if I have this straight - the Pentium 4-M and the Pentium M were available as Socket 478, but the pins on the sockets were arranged differently?

This I believe to be true.

Other reasons why it's a no go?

-BIOS/EC tables need to be programmed for each CPU
-Voltage/power requirements differ by CPU class
-Heat output/thermal design/cooling differ by CPU class

The Spirit of X21 · #8 Post by **The Spirit of X21** » Mon Sep 24, 2007 11:17 pm

underclocker wrote:
The Spirit of X21 wrote:OK. Let's see if I have this straight - the Pentium 4-M and the Pentium M were available as Socket 478, but the pins on the sockets were arranged differently?
This I believe to be true.

Other reasons why it's a no go?

-BIOS/EC tables need to be programmed for each CPU
-Voltage/power requirements differ by CPU class
-Heat output/thermal design/cooling differ by CPU class

Thanks for the info, Ed.

R32 Pentium M > Centrino?

R32 Pentium M > Centrino?

Who is online