Planning to migrate to XP Pro 64 bit from XP 32 bit

SUBMAN1 · 01-17-09, 10:19 PM

The memory range you reference is only available to the kernel / system (The 4th GB). It can see it, though it is unlikely to ever use it. A 32-bit OS can't see beyond 4GB (Well, this is not true, but for XP / Vista it is).

Add the /3gb switch to your boot.ini profile. You can make apps built in Visual Studio 6 or later able to access a full 3GB instead of only 2GB.

This can break older apps however that crash upon seeing anything more than 2GB available - a just FYI thing here. The point being, you probably don't have any anymore apps this old.

-S

01-17-09, 10:19 PM	#2
SUBMAN1 Rear Admiral Join Date: Apr 2005 Posts: 11,866 Downloads: 0 Uploads: 0	The memory range you reference is only available to the kernel / system (The 4th GB). It can see it, though it is unlikely to ever use it. A 32-bit OS can't see beyond 4GB (Well, this is not true, but for XP / Vista it is). Add the /3gb switch to your boot.ini profile. You can make apps built in Visual Studio 6 or later able to access a full 3GB instead of only 2GB. This can break older apps however that crash upon seeing anything more than 2GB available - a just FYI thing here. The point being, you probably don't have any anymore apps this old. -S __________________