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Windows 7: Memtest and missing (PCI) memory addresses

26 Apr 2012   #1

Windows 7 Ultimate x64
Memtest and missing (PCI) memory addresses

If I place a single 4GB stick in my machine and run memtest, I see it's testing only 3.7GB. I assume this is the PCI memory map taking 0.3GB. Does this mean I'm not actually testing all the memory or am I missing something?

My System SpecsSystem Spec

26 Apr 2012   #2
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)

I really don't know the answer, but an assumption would be that it takes some memory to run the computer and the test.
My System SpecsSystem Spec
27 Apr 2012   #3

Windows 7 Ultimate x64

Hmmmm so I'm not actually testing all the memory then?
My System SpecsSystem Spec


 Memtest and missing (PCI) memory addresses

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