Windows 7 64bit is only using 16gb of my 32gb memory

Just built a new PC and I'm having a problem with my operating system (win7 x64) only using half my memory. I have 32gb (4x8gb Kingston HyperX) installed in my Asus Maximus VI Hero motherboard, but when I run msinfo32 this is what I get:

Installed Physical Memory (RAM) 32GB
Total Physical Memory 16GB

In msconfig>Boot>Advanced Maximum Memory setting is unticked

CPU is i7 4770k
6 answers Last reply Best Answer
More about windows 64bit 16gb 32gb memory
  1. Best answer
    You need w7 pro, ultimate or enterprise to use more than 16gb ram.
  2. Windows 7 Home Premium allows 16GB maximum
    You need Professional or Ultimate to use more.
  3. If you're using Windows 7 Home Premium 64bit then that's your issue, it's limited to 16GB

    Windows 7 Ultimate, Windows 7 Enterprise and Windows 7 professional (The 64bit versions) allow anything above 16GB
  4. Gah you're right guys, I never came across any info on this when I was researching my memory! I suppose the cheapest way for me to get Pro is the Anytime Upgrade feature. Do any of you know whether the upgrade is permanent: ie - if I were to re-install windows at a later point in time (on the same PC), would the upgrade still be usable or would I have to buy a new upgrade?
  5. It's permanent.
  6. Cool, thanks again everyone! Very much appreciated.
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