I am building a high end workstation for a rocket scientist buddy. Yesterday I received the CPU, MB, and NVME SSD. I assembled them very carefully and used 2 4GB sticks of Corsair DDR4 from my machine to fire it up. (I have 128GB of "certified" HyperX DDR4 coming tomorrow) It fired up fine although it did this quirky thing where it would start for about 5 seconds with the problem number panel changing but shutdown and then restart and then run to BIOS screen. So it looked good and no smoke. However I then tried to install windows and numerous times it goes through the pre-load and hits the screen "Starting WIndows" and then the machine completely reboots. I've tried various BIOS settings and turned off IOMMU because I read it can cause problems with no luck. I've tried two different memory sticks of memory from my machine and a different video card as well as removing the SSD and trying a HDD. It still does this. I will withhold judgement until the new memory arrives tomorrow but I am getting concerned of possibly a MB problem. One other thing to consider is when I changed out the memory this morning for two of the same types of sticks it does seem to have ended that start/stop/start thing so I am thinking it could be memory. Thoughts are greatly appreciated.