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4GB support on X61s
Posted: Wed Jul 04, 2007 5:44 pm
by spune
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
Posted: Wed Jul 04, 2007 6:08 pm
by tomh009
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.
Posted: Thu Jul 05, 2007 4:56 am
by vkyr
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.