32 Bit CPU with memory more than 4 Gbytes
One day, I got a Dell server based on Intel Xeon EM64T 32 bit with 8 Gbytes RAM. As far as I know, 32 bit CPU could only map 2^32 or 4 Gbytes RAM, so with this 8 Gbytes RAM will it be useless?Or should I use 64 bit CPU which could map 2^64 or 18446744073709551616 bytes memory.
and found that Intel technology already found solution for this problem. Intel CPU 32 bit could read memory more than 4 Gbytes using INTEL® EXTENDED MEMORY 64 TECHNOLOGY (EM64T) . Intel EM64T could process memory up to 64Gbytes.