[CentOS] To PAE or not to PAE...

Thu Jul 22 19:15:09 UTC 2010
Drew <drew.kay at gmail.com>

>> I was wondering if anyone would know the cons of running a PAE kernel...?
>> I have a 4GB pc and was wondering if it was worth going the PAE way to gain
>> those exta 700MB...
> You should use 64 bit if possible but if you're seeing 3.2GB, it's more
> likely that your motherboard is not capable (I have one of those here
> right now).
>> In the past, I heard that these 700MB were normally reserved for bios or chipset
>> stuff...
> It still is, even with with 64 bit. If your motherboard supports
> remapping this memory with 64 bit you can use the whole 4GB. Otherwise
> you're limited to 3.2:

Second this. It doesn't matter if you use PAE or x86-64. Without
support in the bios for remapping the lost memory you'll never recover
that extra RAM.


"Nothing in life is to be feared. It is only to be understood."
--Marie Curie