So Vegas keeps crashing on me. I am editing GH5 10bit 4k files. Some of them are original but most have been converted to ProRes HQ 4K

After the project loads, within seconds I'll get an error message and after clicking it off everything shuts down.

or

I'll start editing and I'll stop getting any signal from the monitors. I'll have to shut the PC down and then restart everything. Or sometimes the monitor signal will start up after a couple of seconds and Vegas will have crashed.

This indicates a GPU issue, but I tried another GPU and had the same result.

The weird thing is my system worked perfectly fine until I switched the hard drive to another motherboard. I ended up putting everything back together like it was originally and reinstalling windows. But I am still getting the issue. The only difference now is I have my files on a secondary drive that I edit off of. I used to have all my files and windows on the same drive.

I am editing GH5 10bit 4k files. Some of them are original but most have been converted to ProRes HQ 4K

Here is my current system.
i5 6600k
16gb RAM
Radeon R9 290X 4GB
ssd SanDisk Ultra II (second drive)
ssd Samsung 850 EVO sata III (windows)