[root@balrog morten]# cat /proc/mtrr
reg00: base=0x00000000 (   0MB), size=1024MB: write-back, count=1
reg01: base=0xc0000000 (3072MB), size= 128MB: write-combining, count=5
reg02: base=0xe0000000 (3584MB), size=  64MB: write-combining, count=1