It is easy to get MTRR (Memory Type Range Register)1 information on Linux through procfs, aka the /proc pseudo file system. But there is no tool to get similar information on Windows (or at least I could not find any). So I have written a command line tool called mtrr to dump MTRR information. Here is what I got when I ran it on my Vista machine -
mtrr is currently in beta and is not supported on 64-bit windows. This is partly because of driver signing requirements on 64-bit. You can download latest version of mtrr from downloads section here.
1MTRRs describe and define CPU cache behavior of memory ranges. They are typically setup by BIOS or OS