Hi everyone,

I have  machine here that a friend of mine built. It is a CAD workstation, to which he took the parts of another build, and simply built it himself. For  a little over a week, it worked great, but as of yesterday, it has crashed twice during work. Two windows errors reported were:

   1.

     DRIVER IRQL NOT LESS OR EQUAL

     What failed: nviddmkm.sys

   2.

     KERNAL_SECURITY_CHECK_FAILURE

Since then, it will POST, allow me into BIOS, then freeze. Otherwise, it will go to the windows screen to say "Something went wrong. We are repairing" or something along those lines. Occasionally it will also give the mobo error code: EE

Since then, I have reset everything back to default (in terms of clocks on both RAM and CPU), I've re-installed the RAM and CPU, I've cleared the CMOS, and it continues to perform the same way. Two key points that I've noticed are right before it freezes, pixels begin to tear across the screen (almost as if someone had scratched away some pixels and left blue pixels there), and the CPU voltage is at 1.792, at least according to the BIOS. When he ran stress tests after the initial build, it never made it past 1.1.

Is there anything anyone knows as to whats happening? My first thought was it was overheating in the CPU or RAM since he had overclocked them, but that doesn't make sense now. The temps are low, but the voltages are ridiculously high. Any help is greatly appreciated.

The specs are:

Motherboard: ASRock x299 Taichi

CPU Cooler: Corsair H75

CPU: Intel i7-7800X Clocked to 4.4ghz

RAM: Corsair Vengeance 288-Pin DDR4 2666

GPU: PNY Technologies Quadro P4000

Storage: Plextor M8Pe M.2 2280 512GB NVMe PCI-Express 3.0 x4 MLC Internal Solid State Drive

PSU: ECGA SuperNOVA 650 G1

Hey Man,

Thanks for the advice. The RAM itself is compatible with the MOBO, but the frequency was restricted to by the CPU itself. I lowered it to 2133, and cleared the CMOS and it will now allow me into BIOS with no freezing or crashing.

Still two problems left though. For one, the CPU voltage is still at 1.792. When I checked the voltage limit, it was set to Auto, still remained at 1.792. Would I need to lower the frequency of the RAM again to get that down?

Also, when I load into Windows, the desktop operates fine (for a while), but its all black. No flashyness whatsoever from Windows 10, and in the top right of the desktop screen it says OS Version, User of the computer, etc. It also just crashed with the Stop code:

KERNAL_SECURITY_CHECK_FAILURE

I'm going to continue to tweak some stuff and see whats up. Thanks for the help though, if you have any more advice, please share.