ThinkPad system Memory description Memory speed Maximum memory size
R30, R31 PC133 SDRAM 144-pin non-parity SoDIMM 133MHz 1GB


ThinkPad 64MB SDRAM SO DIMM 19K4650 19K4651 Yes 3.3 Volt, 144-pin, non-parity, 64-bit, 133 MHz SDRAM memory
ThinkPad 128MB SDRAM SO DIMM 19K4652 19K4653 Yes 3.3 Volt, 144-pin, non-parity, 64-bit, 133 MHz SDRAM memory
ThinkPad 256MB SDRAM SO DIMM 19K4654 19K4655 Yes 3.3 Volt, 144-pin, non-parity, 64-bit, 133 MHz SDRAM memory
ThinkPad 512MB SDRAM SO DIMM 19K4656 19K4657 Yes 3.3 Volt, 144-pin, non-parity, 64-bit, 133 MHz SDRAM memory

Cheersssssss........

do u used power management software?
what version?
what ur current setting?

upgrade through ibm with ibm parts will cost u bomb.
already did the comparison ...last time WD 40GB outside will cost u around 2-3 hundred once u purchased it from IBM exactly the same stuff and brand except additional printing (IBM part number ) the price will jump to 9 hundred to 1.2K

just asking , why most thinkpad sellers are hard to reveal the machine type and model together with the serial number to the buyers. is there any harm can the buyer or anyone else do with the details???

- Yes im a serious buyer, as i also need to know the history of the particular machine that i would buy.
- with the mach type and sn, i would give lenovo a call and ask for the history of the thinkpad through the mach type and sn,
- with the mach type and sn , i would know the exact spec.

i dont think we can compare revealing mach type and sn equally like revealing our IC.
i assumed it just something like ur car plate number.
-imagine purchasing a second hand car without knowing the the car registration plate number and not able to cod. u only know it a wira 1.5 with a warranty that would end 2011.