>>>>> "FT" == ForrestX Taylor <Taylor> writes:

FT> IIRC an 32-bit processor can only address a maximum of 4 GB (2^32)
FT> RAM 

>From PPro on, x86 processors can access 2^36 bytes (64GB) using some
tricks.  Commodity motherboards accepting 6GB and more have been out
for years.  I just picked up some dual Xeon boards for ~$500 that will
take 12GB.

The kernel needs to be compiled specifically to support that much
RAM.  I think the Red Hat "enterprise" or "bigmem" kernels built with
CONFIG_HIGHMEM64G=y, but I'm not sure if they shipped those with 7.1.

The per-process addressable memory stays at something under 4GB
regardless of how much you stick in the box.

 - J<



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