On Thu, 2010-07-22 at 17:33 -0400, ken wrote: > On 07/22/2010 02:39 PM Hakan Koseoglu wrote: > > JD, > > On 22/07/10 10:25, John Doe wrote: > >> 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: > > > > hakan at photon:~$ free -m > > total used free shared buffers cached > > Mem: 3262 1972 1290 0 103 737 > > -/+ buffers/cache: 1131 2131 > > Swap: 7812 308 7504 > > hakan at photon:~$ arch > > x86_64 > > I'm trying to catch up... > > Is the 737M cached (in the output above) what is reserved for bios or > chipset...? and what is gained back through remapping? --- If you would look at my prior post you can actually see it as in whats used. It is 2GB of ram on 12GB capability. Run "dmesg | grep Memory" on your machine to see it.