I built my PC last year with an AMD MSI b450 gaming plus MB https://www.msi.com/Motherboard/B450-GAMING-PLUS/Specification using an amd ryzen 5 2600 and 2 sticks of patriot viper 4gb sticks. I recently needed more than the 8GB memory i had to i bought another 2x4 pack of the exact same memory cards. I now have 4 sticks of 4GB patriot viper memory and when trying to install the new sticks the computer would no longer show video upon boot. The computer turned on and everything moved and lit up as if it was on. I tried messing with cords and monitor on the monitor end with no luck. i then powered off and removed the sticks i had just installed and the computer worked fine again. I then removed original sticks and replaced with a new set i had just got and again everything worked fine. I tried to reinstall all 4 again and the same problem as before with no video output. I then removed slot 1 and 3 sticks and booted the bios and removed all OC i had to ram. Reinstalled cards and then computer would not turn on for more than 10 seconds at a time, never displaying output. Re removed cards in 1 and 3 again and upped voltage to memory and had the same original problem. Switched to setting memory voltage to auto with no avail. I am kinda lost as to what to try next. As per MB manual, it says there should be no problem running 2 channels with 4 sticks of memory and should support up to 64 gb of ram and i am only trying to do 16. Things i am thinking of trying is to enable xmb and reducing my OC on CPU but was looking for other suggestions or comments before i try either because i hate the OC process with trying to find a balance.