Rich wrote: > I've got a system that supports up to 4G of ram, but says it has > 33bit(?) addressing so will see 8G of memory: > > The NVIDIA® MCP73V is a single-chip with proven reliability and performance. > • Supports 33-bit addressing for access to 8 GB of system memory
This is what is known as PAE (Physical Address Extension). It works much the same way as the original 8088 did with segments and offset registers, allowing you to access more RAM than the baseline register size. > Does this mean that I can somehow actually use the 4G of ram and the > other ports, etc. will be mapped to somewhere above 4G and less than > 8G? It will only happen if you have more than 4GB of RAM. > Would I have to use the 64bit OS, or can I use the 32bit OS with the > mods (that I can't remember the name of) that Gus mentioned in > answering another question of mine. You can use a 32-bit OS with a kernel that has PAE compiled in. Redhat provides PAE kernels for Fedora and RHEL. If you want to use Ubuntu, it looks like you would have to make your own PAE kernel. But if you have a 64-bit processor there isn't much reason to run 32-bit anymore since 64-bit supports 32-bit apps pretty well. Gus -- KPLUG-Newbie@kernel-panic.org http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-newbie
