Are you bitcoin mining or doing anything else in the background? Have you tried using a different internet browser?
I believe these sorts of issues started appearing with like the 12.9 or maybe the 12.11 drivers - I forget which. I only really have issues with it while my cards are bitcoin mining in the background, and some driver revisions have been better with Firefox and some better with Chrome.
I am absolutely doing nothing at all in the background. The only process I have open is Chrome, and it happens constantly.