Can't Use all my ram?

[lt13kformula]

Hey everyone probably a stupid question but I'm curious, I have a win 7 64 bit system, asus sabertooth z77 mobo, g.skill 32 gigs of ram, 900 w psu.
Question is: I have the ram installed correctly, windows reads the ram, yet will only let me have 16 gigs available outta 32..Can someone please tell me why or did I just go wayy overboard and I now have 16 gigs of paperweight in my pc?

 

[Tradesman1]

First thought is if Win Home Premium 64 it maxes at 16GB, and this catches lots of folks, if that's not it, it's prob a hardware issue - what CPU and is it OCed? Do you have the latest BIOS and mobo drivers?

 

[lt13kformula]

it is win home premium, so thats probably the problem 🙁, CPU is a 3770K OC to 4.2. Does the cpu clock limit the ram too?

 

[Tradesman1]

Nope, 3770K can handle all the DRAM you can throw at it, sadly it's your OS dragging you, need Win7 64 Ultimate, Enterprise or Professional - they can all (if it were available 😉 ) run up to 192GB