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This has only ever been a chipset limitation. Not that long ago there were 64-bit capable Nvidia chipsets that could still only address 3GB of physical RAM due

by kogir 15y ago

This has only ever been a chipset limitation. Not that long ago there were 64-bit capable Nvidia chipsets that could still only address 3GB of physical RAM due the way they mapped device memory into the system address space [1]. Sandy Bridge processors contain their own memory controllers that can address 16GB-32GB of RAM. True for any system they're in, as long as all channels are linked to physical DIMM slots [2]. [1] http://blogs.msdn.com/b/hiltonl/archive/2007/04/13/the-3gb-not-4gb-ram-problem.aspx http://blogs.msdn.com/b/hiltonl/archive/2007/04/13/the-3gb-n... [2] http://ark.intel.com/ http://ark.intel.com/

pasbesoin 15y ago
Hmm, your links imply that my old Inspiron 6400 might be able to take two 2 GB modules (the manual says it can handle a 2 GB module) and have access to something more than 2GB of addressable RAM. Anyone happen to try this with this or a similar model Dell? (The 6400 is equivalent to the 1505, IIRC. Its manual says it's limited to 2 GB of RAM.) EDIT: Answering myself, it appears it can take 2 x 2 GB sticks. The following Dell forums thread describes this, although this particular post linked claims that the configuration will disable dual channel memory access (but then again, other posters are happy and view the expansion as an improvement). http://en.community.dell.com/support-forums/laptop/f/3518/p/18322272/18445258.aspx#19007577 http://en.community.dell.com/support-forums/laptop/f/3518/p/... EDIT2: I've seen some other comments that dual channel remains enabled (with matched 2 x 2GB sticks). I guess I'll give it a go.
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