Having Graphics issue with Kronos Emulator via RetroArch

Guys, i really have no idea what’s going on but, i downloaded and placed all the nessecary BIOS files to the right place but, i’m having problem with Koronos Emulator wether i use it Standalone or in RetroArch on my Windows 10 As you can see on the image i’ve sent there are these Blue Dots hanging all over the screen when i’m running a game image I don’t know what’s wrong, my GPU is somehow new it’s an MSI RX 560 which is quite capable and my PC is, ummm, not that bad, so, i don’t know can u help me n tell me what’s going on ? Also if u can recommend any better core to use emulating Sega Saturn please don’t hesitate to tell me