Please do a bios reset first
Then set memory to XMP, and CPU Core/Cache Voltage to Adaptive mode.
Test and if you still have problems give a reply here. If you have blue screens please note them also.
I already tried this, bios reset, XMP and also adaptive mode on core/cache voltages, with no effect.
However, I removed GeForce from the PC, I use now integrated graphics with 2 monitors only and it has been running already 36 hours with no issues.
I will wait several more days and then I plan to try it with AMD graphics card.
Try disable integrated graphics, and use only the gtx 760 and see how it works.
If you use the integrated graphics + discrete graphics you will have to increase VCCSA, VCCIO and maybe PCH +1.0V voltage slightly.
If that 64 GB memory kit is 4x16 then you will have a big problem to find the right VCCSA and VCCIO voltage. VCCSA can go up to 1.3V, VCCIO up to 1.25V. Don't go straight to those voltages. Do small increments, till you find the stable voltages.
I would like to know what is the frequency of the memory kit. What is the model.
My suggestion is to increase first VCCSA maybe you will be lucky and get system stable.
That frozen state looks like Image off, it seems that is a problem with gtx 760.
Please update the video driver to the last one from nvidia website:
and if you have same problem try to swap video cards and check then.
I am not sure what Image off means, it is crashed display driver, the very latest one from NVIDIA, but several previous versions exposed same behaviour.
As I wrote in first post, if I tweak some PLL voltages, it becomes very frequent, looks exactly like this, but instead of freeze windows are able to recover the display driver.
That CPU PLL doesn't do much difference, Try increase VCCSA to 1.25V, and VCCIO to 1.15V
Ok, I will try it and report back.
no, I have been quite busy since my last post and I need to finish my work first.
My PC has been perfectly stable since I removed GeForce from it.
I plan to try it out again this weekend.
Yesterday afternoon I put back the GeForce and increased VCCIO and VCCSA by the smallest possible steps.
Comparing current HWINFO values with previous screenshot I see these changes (old value : new value)
VTT 1.160V : 0.984V
VCCSA 1.128V : 1.152V
IMC 1.136V : 1.168V
VCCST_A 1.163V : 0.988V (same as VTT)
CPU PLL 1.209V : 1.228V
VCCMP 1.138V : 1.169V (same as IMC)
I am not sure why some values are smaller, but so far the PC appears to be stable.