I recently built a new custom computer and used the following components:
+ Motherboard: Gigabyte GA-Z97MX-Gaming 5.
+ RAM: Corsair Vengeance Pro 16GB (4 x 4 GB) DD3-1600.
+ CPU: Intel Xeon E3-1231 V3 3.4GHz Processor.
+ Storage: Intel 520 250 GB SSD.
+ Video Card: Gigabyte GTX 970 G1 Gaming.
+ PSU: Corsair RM Series 550w.
+ Drivers: All drivers are up to date and have been installed from Gigabytes website. BIOS is also up to date.
+ Operating System: Windows 8.1 x64-bit
I am experiencing two issues and I am not sure if they are connected so I'll list them separately.
1st Issue: Occasionally when I restart the computer, Windows will go to the "Restarting..." splash screen as expected, but afterwards, the screen will go black and the restart process won't complete. The computer components are on and so is the monitor. The only way to get it out of this state is to do a hard reboot.
2nd Issue: Occasionally when I boot or restart the computer, it will be extremely laggy after start up. Here is a video with me moving Firefox with task manager showing CPU usage: https://youtu.be/2XnbYj98uF8. Notice the CPU spikes up to 40+%. Nothing else is running.
Solutions I have tried: I have tried reformatting my hard drive. Replacing my hard drive. Running MemTest86 (found no errors). Re-securing the cables on my motherboard. Turning off fast startup.
I'm not sure what else to do. Any help would be much appreciated. Thank you!