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SubjectRe: How to make all of 4GB of memory available?
Gene Heskett wrote:
> Greetings;
>
> New mobo, 4 core AMD Phenom cpu & 4 GB of dram. I cannot find the switch in a
> make xconfig that will allow use of all of it, I am only seeing 3GB.
>
> Am I going blind in my dotage?

Does it all appear in the e820 map? If not, then the chipset is
probably masking it; check to see if there's any likely-looking BIOS
options to make it appear.

I assume you're compiling for either 32-bit PAE or 64-bit. If you're
compiling 32-bit without PAE (HIGHMEM64G) then the remaining Gbyte may
simply be above 4G and out of the kernel's reach.

J


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