4GB support on X61s

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spune · #1 Post by **spune** » Wed Jul 04, 2007 5:44 pm

I'm planning to buy the Thinkpad X61s and install Vista Business x64 separately. I was wondering if if the laptop fully supports 4GB of RAM. Apparently the T61 only supports a maximum of T61 3GB due to the restrction in the BIOS, according to this post:

http://forum.notebookreview.com/showthr ... 342&page=2

#2 Post by **tomh009** » Wed Jul 04, 2007 6:08 pm

I remain unconvinced ... the only evidence is that "a friend tried and phoned me with the bad news". Meanwhile, I have seen multiple posts where the full 4 GB (less the shared memory used by graphics) is available using Linux. The tabook also says that 4 GB is available to 64-bit operating systems.

So at least in my books it's only a rumour so far until someone presents some evidence to the contrary.

vkyr · #3 Post by **vkyr** » Thu Jul 05, 2007 4:56 am

HP has some papers about the Windows RAM allocation scheme...

http://h20331.www2.hp.com/Hpsub/downloa ... WP_x64.pdf

...and...

http://h20331.www2.hp.com/Hpsub/downloa ... 08Ap07.pdf

...which explain what usually is cut off from the system RAM by the BIOS.

4GB support on X61s

4GB support on X61s

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