RAM limitation after SP1

[Zweibel]

I have a Thinkpad T60 and understand that my RAM is limited to 3GB.
(although 4GB were installed when I bought the machine)

I am running Vista x64 and am now thinking of downloading SP1.
I have read that Vista will then recognize the 4GB, but will the additional 1GB really be used?

Thanks for your help.

[erik]

nope.   the T60 is chipset-limited to 3GB regardless of OS.   this is in the first three paragraphs of the memory sticky above.

T60 and T60p:
the T60 and T60p are based off of the intel socket M processors.   no matter how much memory you install in these thinkpads, only 3GB will be addressable regardless of operating system used.   this is a physical limitation and there is absolutely no workaround.   if you have a T60/p then installing 4GB total system memory is a waste.   save your money, stop at 3GB, and put the savings either in the bank or toward a T61/p if you want 4GB.

quoted from official lenovo documentation:

Maximum memory capacity may require the replacement of standard component with largest supported component available. On ThinkPad systems with an Intel 945GM, 945PM, GM965, or PM965 chipset, even though it is possible to physically install 4GB of memory, the actual amount of memory addressable by an operating system will be limited to 3GB. This limitation does not exist with the Intel GM965 and PM965 with the 64-bit operating systems Windows XP Professional 64-bit and Windows Vista 64-bit Editions.

the key point to take away from this quote:   the T60 and T60p are based off of the 945GM and 945PM chipsets and therefore fall under the 3GB physical limitation as stated above.   even with 4GB total system memory and a capable OS, you still can't see or use more 3GB no matter what you do.

even if vista SP1 reports 4GB in the computer properties window, the task manager will bring you back to reality and show 3GB.   there's no way you'll get around the hardware limitation.   sorry.