I just got this graphics card (Gigabyte Aorus Radeon RX 580). It worked fine, but recently it stopped performing so well. I play games like PUBG and GTA V, and so whenever I play them, the game just stutters randomly, mostly when someone is shooting at me. And just now I experienced a crash because my monitor said that there is no signal, and after like 2 seconds, it said "DVI" and turned on again, leading the game to crash. My question is, why would this happen and how can I fix it?