Hi, I have had an R9 380 4gb oc asus strix card for a few years, and never really got it stable, and yesterday I got a sapphire R9 390 Nitro+ w. backplate for free. The problems I had the years I had this 380, is that when playing Elder Scrolls Online, the computer just locked up, even if I was alone in a house or cave. The 390 is waaaay better in that regard, but after a few hours of gaming, the computer just shuts down, no bluescreen, no black screen, just turns off...so I have to restart it again, and wattman has changed my small settings back to stock. Nothing in the logs as to what crashed... My PSU is a cooler master silent pro M 850W, http://us.coolermaster.com/product/Detail/powersupply/silent-pro-m/silent-pro-m850.html I had it for several years, and have changed motherboard 3 or 4 times during that period. Or is it because I just have 1 stick of crucial ballistix elite 3466 on my ASUS B350 Prime motherboard? I think the question I am trying to ask, is: New PSU, or another stick of memory? Or changing memory to another brand? cpu is an AMD Ryzen 1600X, with good cooling. I had the same problems with the 380 when I ran it with an fx 6300. I'm thankful for any idea as to what to look for, and so on.