About to head home and tinker, any last thoughts?
I think I will swap out all my risers with this other set I have and increase the virtual memory size. Also I will check every connection to make sure its seated properly.
Yup. As others have pointed out find the bad card/riser/psu.
Before you test that please remove any overclocks on your gpus as that can add to system instability.
Install one card at a time directly to the mobo. Check all cards this way.
Then start adding risers to each card and test.
On the software side starting with a DDU and a driver reinstall would help eliminate software related issues.
FYI, what celeron are you using. Is it a 3900 (just keep in mind the system can be laggy since its not the most powerful).