you want to install 8 gpu with only 4 gb of ram ? wtf
you didn't mention if you plug hdmi in motherboard or in gpu ?
first thing to do: check if you have any problem in safe mode. if no problem in safe mode then it means its driver problem, in this case use ddu then install fresh copy of driver and you shouldn't have any problem
I was wondering the same with the 4gb of RAM. I have read quite a few posts, where 4gb does 12 GPU's, so this was my first stop. But i knew it couldn't be the RAM as when i added another 4gb the problem still existed.
Anyway, i managed to overcome it. I added one by one, increased the Virtual Memory to 24000. And so far it has run for 12 hours no problem at all with 4gb.
I did find a slightly loose 8 PIN connection on one of the GPU's. So maybe that was the reason ?
Still using the block chain driver too.
Will report back once i add the other 4.