sHad3s-67

Thanks everyone! To clarify a few things. Have done a Clear CMOS (or CLRTC as it's called on this MoBo) several times and pretty much after every time I replaced any hardware. New location means I delivered the computer to my sister who is the actual owner. I went back and brought my own media-rig for testing, unfortunately Intel based so limited testing capabilities but could use my RAM and PSU along with my SSD at least. This is how we ended up with assuming it had to be either MoBo or CPU, and we managed to replace both. Computer started immediately, repaired windows, rebooted, everything was fine. Updated BIOS, set it for automatic optimization (or whatever it was called in BIOS) which set it for 10%OC and locked RAM at 3200MHz as that's what the sticks are specified for. I got back in my car and drove the 5 hours back home... Afternoon the day after....windows BSOD with stop code KERNAL SECURITY CHECK FAIL and now we can't even open the windows installer even without the SSD in the system. And yes, all BIOS settings have been restored to defaults. So currently, original RAM (OK according to MemTest86), original PSU, NEW MoBo, NEW CPU. Is it possible that the PSU is frying either the MoBo or the CPU? I have considered trying to run the CPU on only 4pin power instead of 8pin if that would do any difference?

That was my original thought, was down to CPU or MB. Went back to the store to see if they could put the things in a test-rig, guy at the store was awesome, all of their test-rigs was busy (apparently lots of GPU's suddenly start to break when NVidia releases new ones) so he just agreed to let me replace both of them. So right now I'm sitting with more or less the same issue as before despite having both MB and CPU replaced. Weird thing is it worked for one day after the replacement before it started crashing again.

Posted this in the wrong forum first, sorry about that... So this is a weird one... Been through as many forums I can imagine and haven't found any solution for this yet. Brand new mini-ITX build in Fractal Design Core 500 case. MB: Asus ROG Strix B450-i Gaming CPU: Ryzen 5 3400G (APU, built in graphics) RAM: 2x8GB Corsair Vengence LPX3200 CL16 DDR4 GPU: Asus RTX2060 6GB DUAL mini OC PSU: Cooler Master Reactor 550W 80+ Gold Storage: Kingston A2000 1TB NVME Ad storage: Seagate Barracuda 2TB HDD Cooler: Noctua NH-D9L Also an old optic DVD drive I had lying around. OS: Windows 10 Home, retail. Memory set to 3200MHz, automatic optimization settings from UEFI BIOS. First of all, computer worked perfectly fine at first. These issues started after moving it to a new location. New display, new keyboard, new mouse. Started crashing randomly after a few days and eventually windows would not boot at all. Managed to reinstall windows but the crashes continued and back to square one. Tried different PSU and RAM as well as trying to boot from another Sata SSD with preinstalled windows, no changes. Managed to replace MB and CPU which at first seamed to resolve the issues, everything worked like a charm for one day. First crashes gave Stop Code: KERNAL SECURITY CHECK FAIL The computer now crashes/freezes while trying to boot up windows installer. Only things connected are MB(new), CPU(new), RAM and PSU. NO SSD/HDD connected. No RAM issues according to MemTest86. All troubleshooting has been done with GPU disconnected. Theories so far: Keyboard and/or mouse is defective and causes the system to crash? PSU is defective and burns out MB/CPU over time causing permanent damage? Broken software burned out CPU? Both times issues began after installing Photoshop (unknown source as I wasn't the one to install it) Would be thankfull for any theories that could help explain this.

Update: MemTest86 showed no issues with memory. Is it possible there's something wrong with the PSU and that issue permanently damages the MB and/or CPU?

As it has built in graphics the GPU has been disconncted during all troubleshooting. Tried another PSU during initial troubleshooting with the original MB and CPU. The really weird thing is that it was working perfectly for a day after MB and CPU replacement before issues restartet. First issues that appeared after replacement was KERNEL SECURITY CHECK FAILURE

Like I stated before, windows installer crashes while booting even without the SSD connected. MB has been replaced, CPU has been replaced. Have not tried different RAM on this MB but replacing the RAM didn't do any difference on the original MB.

So this is a weird one... Been through as many forums I can imagine and haven't found any solution for this yet. Brand new mini-ITX build in Fractal Design Core 500 case. MB: Asus ROG Strix B450-i Gaming CPU: Ryzen 5 3400G (APU, built in graphics) RAM: 2x8GB Corsair Vengence LPX3200 CL16 DDR4 GPU: Asus RTX2060 6GB DUAL mini OC PSU: Cooler Master Reactor 550W 80+ Gold Storage: Kingston A2000 1TB NVME Ad storage: Seagate Barracuda 2TB HDD Cooler: Noctua NH-D9L Also an old optic DVD drive I had lying around. Memory set to 3200MHz, automatic optimization settings from UEFI BIOS. Built the rig for my sister, at first everything worked like a charm. Installed windows without a hitch, ran some games 1080p Ultra settings, buttersmooth. Also ran some light stress tests while monitoring temps and no issues. Problem started after I handed the computer over to my sister who within 2 days started experiencing crashes while gaming. It crashed 3 times and after that wouldn't boot windows again, would get stuck on "windows repair". Eventually with everything disconnected except for MB, CPU, SSD and one RAM stick we managed to reinstall windows though the computer crashed 3 times during installation process. Windows would again boot sometimes but usually crashed or froze during boot up, eventually wouldn't boot at all again. Have tried replacing RAM with Corsair vengence 4GB LPX from my other rig and the same problem. Have updated BIOS, same issue. Clear CMOS, same issue. Have tried with another PSU, same issue. Eventually we managed to get both MB and CPU replaced with brand new ones. (I do not have another AMD rig to test MB/CPU individually) Computer booted up and repaired windows from the old installation without a problem and the issue seemed to be resolved. Put all the parts back together, original RAM, original GPU, extra storage etc...... Everything was once again working normally. One day later...computer is once again crashing during windows boot.....and computer is now also crashing while atempting to boot windows installer from Flash drive without any internal storage connected. The one thing I've managed to find so far is that the issues seem to have started after installing Photoshop, though I can't imagine how a software could so severely cripple the hardware. What we haven't done is trying to replace the RAM after the MB and CPU was replaced, this is because my sister doesn't have access to any other RAM to test with and we live 5 hours apart. Will be running MemTest86 later today.