Thread: What is PAE
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Old August 25, 2013, 10:37 AM
Corellon Corellon is offline
Join Date: Sep 2010
Location: Ajax / Toronto
Posts: 25

From my own experiane PAE is good for server stations that need the memory but not running massive memory intensive tasks. I have a system running 2008, I can't run X64 because it's a 32 bit xeon so have to make due, PAE lets it run above the 4GB mark. The issue is that not all of the memory can be accessed at once, you still only have 4gb of addressing space, so the more memory you have the more it has to "translate" the addresses, similar to a swap file it will swap assigned address spaces in the 4gb area to the area needing to be accessed, but bad programming can make that a huge issue, if it doesn't verify the address space and assumes it's consistent then it writes to the wrong address or reads from it.
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