ThinkPad A21e CPU Upgrade

[robsonn]

First of all HI I'm new on this forum
I've found this fantastic forum and i've already searched for answers but dont found what i want.
I have ThinkPad A21e (model 2628) with celeron 600 Mhz proccessor and i want it to upgrade.
Processor x86 family 6 model 8 stepping 6
Memory - 256 MB
Bios - 1.13 KUET36WW (probably latest) 2003 - 06 - 11
Machine type 2628JXG
TFT 15"
I know that these laps were sold with max. celeron 800 Mhz. And i have possibilty to buy cheap Pentium III Mobile 850 Mhz on socket micro PGA2. And here i have some questions:
1) Is processor soldered to the mainboard on A21e series or they use socket?
2) I think that mainboard i have (with intel 440mx chipset) use speedstep (correct me if i'm wrong). If this MOBO can handle PIII 850 or faster ? If yes then what is maximum speed possible 800, 850, 1, 1,13 GHz ?
3) I'm afraid about cooling. If cooler what i have will be enough for PIII 850 or faster ? (No i use CpuIdle and it works great, average cpu temp. is 48-52oC)
4) If changing from Celeron 600 to ex. PIII 850 will give me some real performance boost (i hope so )

I will be very grateful for help.

P.S. Sorry for my english.

[lithium726]

1) no. Only the Ultraportable TP's (read: 2xx series, 5xx series, X series) have the CPU Soldiered on the board, to save space. T, A, G, R, Z series are all socketed.
2) Should be a 440BX chipset, all TP's from this era did. T20-2, X20-2, A21 as well. It supports speedstep and MicroPGA2 CPU's up to 1ghz, that was the fastest one
3)not sure, Ill let someone else field this one
4) should give a nice speed increase More RAM and a faster HDD will help TONS too.

your english is actually very good, i didnt second guess it until you apologized for it

[robsonn]

1) T, A, G, R, Z series are all socketed.

To bad but it's not true. My Thinkpad A21e CPU (C600) is soldered to the mainborad so i cant't change cpu to fastest.
Maybe you know some way to overclock cpu in laptop ?

[lithium726]

really....

thats really surprising. I guess the -e models, which were hte budget ones, also are not socketed.

and no, there is no way to overclock the CPU in that laptop.