Upgrading R51 cpu, what is needed to do so.

[njdjh2o]

I did a search on how to upgrade the CPU and I found a couple of post, but didn't exactly give me what I was looking for.

It stated the max I can go is 2Ghz at 400 bus speed (Dothan), 745, 755, or 765. I founded a couple 2.1, 2.2, 2.3, all the way up to 2.8 at 400 bus speed. Of course I would love to get the 2.8, but would that work in my R51.

Model # 1836-H9U running XP with 1 GB memory (just order another 1Gb memory) with 5400 40gb HD.

Thanks in advance.

[emeraldgirl08]

Probably not. Bios probably doesn't support it, the pins may be different, and more importantly the heat generated would be excruciating (especially in the confines of a laptop)!!!

[RealBlackStuff]

The sweet spot would be a Dothan 1.7 (M 735) or 1.8 (M 745).
The M 755 and M 765 cost quite a bit more and run quite hot.
You need a Pentium M 7x5 (where M means Mobile and x = 1/2/3/4/5/6).
The higher values you found are NOT for a laptop!

[njdjh2o]

They all said M on them including the Cent. Someone put a 2.1 in theres and the said the temp on climbed like 2 degrees.

Why did they stop of 1.7 when there are faster processors.

[ajkula66]

It's really not that simple...and heat IS an issue.

I've had PM765 in a modded R50p and took it out after two weeks, replacing it with PM745. Fan in R5x machines (apart from ATi-based R52) is really not up to the job with a CPU faster than 2.0 IMHO. Yeah, it climbs 2 degrees when you have one IE window open and no AV running in the background...go on youtube for half an hour and watch the machine burn...

Centrino is a platform, not a processor, BTW.