On Wed, Apr 23, 2008 at 05:20:37PM +0800, Feng, Libo wrote: > So, you mean no access will be routined to the last GB memory even > it exists physically, due to FLASH ROM, PCI memory IO, APIC and OS > reservation? Not with physical 32-bit addresses, but using PAE it is possible to reach beyond 4GB, where RAM over 3GB would be available. //Peter