Does anybody have same set as I have:
asus sabertooth p67
G Skill Ripjaws F3-12800CL7-2GBRM (2x2GB)
G Skill Ripjaws F3-10666CL7-4GBRH (2x4GB)
The problem is that mb sees only 8GB of RAM when all sticks are installed. Whatever I did, i couldnt get 12GB. I see 8GB of ram In bios, but also I can see all sticks installed, can read infrormation about every slot: timings, voltage etc. I have tried all things I can do: software: changing bios options for 100500 times, voltages, timings, enabling-disabling various stuff etc; hardware - placed every stick in every slot, combined them in all possible ways, cleaned connectors, slots, checked cpu pins for bent, changed cmos battery, tryied another pairs of ram - got previous 8GB max, but my ram works perfectly on other machines.
I have this problem for years now, tried many times to fix it, but without success. Its not very critical to me, because I still have 8GB ram and its more or less enought for me, but anyway i want to know wtf can be reason for this problem.
Then replace the processor.
You can also run https://www.intel.com/content/www/us/en/support/articles/000005567/processors.html The Intel® Processor Diagnostic Tool
Still, you should be seeking assistance from ASUS regarding their motherboard and its supported memory.