Recently i have upgraded my CPU from i5 750 to Ryzen R5 1500x With Asus B350M Plus Motherboard & 16 GB RAM. With Intel i5 750 + R7 265 Dual X i had no issues of CTD. After upgrading, am getting CTD for All Games. I have tried updating Bios & All Drivers Still Crashes after 5 minutes of game play.
Finally Tried uninstalling the R7 265 Dual Drivers downloaded from AMD & used Microsoft's Win 10 drivers basic driver which installed automatically. Surprisingly no CTD. I played more than hours of all games which was crashing earlier. And also Windows 10 detects my Sapphire R7 265 Dual X as Radeon HD 7800. Kindly help with this issue.
R7 265 is a rebranded 7850, so you can ignore the name change.
Try updating to Crimson 17.8.1 and setting the GPU Power Limit to +50% in Wattman and click Apply.