I had this exact same issue on my new build a month or so ago.
To start of with I thought it was a ram issue as it did it a lot less after removing 2 of the 4 dimms.
In the end, as a last resort before I rma the ram and/or board, I plugged the PSU directly into a wall outlet and it instantly irradiated all the problems!
After doing some testing I came to the conclusion that it was either a voltage spike, or the under voltage protection was kicking in from either a faulty extension lead or other piece of hardware connected to said lead.
Is your PSU connected directly to an outlet?
