Only half of my RAM is being utilized

Rootriver

Reputable
Apr 1, 2015
2
0
4,510
My computer was slow to POST (about 1 or 2 minutes) and slowly booting (about a minute to minute and half even though I have the system on SSD), well it turned out to be my webcam, I removed the USB-plug and it started working again...
But since the webcam is old and I tried removing my new USB headset already, I also tried to remove my RAM before disconnecting other USBs.
So after gazillion CMOS resets, reboots and reattachments of the memories the computer now utilizes only half of it, even though they worked before.
Both pairs (I have two 8 GB kits) work separately, but not together. In BIOS' "Asus SPD information" the mobo does recognize both pairs, but still BIOS, POST and Windows show I have 8 GB of RAM.

Specs:
Mobo: Asus P8H67
Memory: 2x4GB Kingston HyperX 1333MHz and 2x4 GB HyperX Savage 1600MHz
CPU: Intel i5-3550 @ 3.3 GHz
Running Windows 7 64-bit from SSD

P.S. I have tried different combinations of sticks and slots. If I stick one of each, its 4 Gb, if I try with 3 sticks its 50-50 4 or 8 (I think the a-slots are first to come).
 

Rootriver

Reputable
Apr 1, 2015
2
0
4,510
Will try that, thanks... I think it's weird, because they worked together before all of the hassle.

Update:
1.I removed the newer, faster sticks and cleared CMOS
2. ran once to windows
3. Shutdown
4. Installed rest of my memory
5. No signal to monitor
6. Remembered this is what happened when first time installed my new RAM, back then clearing CMOS was the answer.
7. Cleared CMOS and booted, still 8 GB of RAM...