I recently bought a 512MB stick of PC2700 Crucial RAM. But I only seem
to have about 450-some MB of memory: when I run 'free' I get

             total       used       free     shared    buffers     cached
Mem:        451716     295120     156596          0      86396     107672
-/+ buffers/cache:     101052     350664
Swap:      1004020          0    1004020

A similar number shows up when I boot the machine. That's something like
441 MB. So, I'm missing almost 71MB of RAM. Is some of this being used
for video memory, or do I have a bad chip? I've run memtest on it, and
it checks out (...and reports the smaller-than-512 number).

Thoughts?

Dan

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