[SOLVED] Task manager showing only 12gb ram despite 16 installed

[aferrylv702]

Here's a picture showing (in order) task manager performance tab, HWinfo then finally resource manager. I ran a memtest and received 0 errors, and I have a gigabyte x79-up4 with 4x4gb ram sticks all set up in the correct slots.

Task manager shows 3 of 8 memory slots used, HWinfo says otherwise. However does mention "Triple Channel" mode, this is my biggest lead.

As far as I can remember it's always displayed 12 gb in system info/taskmanager, I forgot I had purchased 16gb for this pc until recently when I was interested in more ram, at which point I downloaded HWinfo to investigate. I don't know the next step at this point and I would be very grateful for some pointers ( :

 

[NightHawkRMX]

Try reseating all sticks and clearing CMOS.

 

[aferrylv702]

Try reseating all sticks and clearing CMOS.

Reseating all sticks in the same slots ? I was suggested to try moving them to the other 4 slots by a peer but that doesn't match what the motherboard manual suggests, if the latter is incorrect then I'll go on with reseating normally then clearing.

 

[Calvin7]

Your picture show
F3-12800CL9D-4GBXL

F3-12800CL9D-4GBXL - Overview - G.SKILL International Enterprise Co., Ltd.

The Ripjaws classic has returned! This time, the G.SKILL RipjawsX Series is raising the bar for computing experience and performance expectations across the board. Equipped with XMP profiles and dual-channel capable, your Intel and AMD systems will easily tear through all your games and programs!

www.gskill.com

With 8 memory slots, it appears your using 4 kits of memory. Only one kit of memory is guaranteed to be compatible.

You can make any kind of combinations you want, but there are no guarantees as to if and how they will work if the system boots up.

Your results are typical of such combinations - multiple kits.