Quote
Although you have physically replaced your video card, PD clearly is still configured to use the (missing) AMD Coding Engine. Try running the Optimize tool from the Preferences | Hardware Acceleration menu. You may need to close PD and reopen it for the changes to appear.
I see nothing that would indicate that PD clearly is still configured to use missing AMD from the OP words or the screen snip. The greyed AMD Video Coding Engine in the pic is normal and indicates nothing specific concerning lack of "Fast video rendering technology:". Additionally, I don't believe PD is ever “configured” for either concerning encoding, it’s a user preference and selectable depending on what hardware is available and what produce profile.
prevaljo, Since you latter implied it worked initially, post a full screenshot so one can get a glimpse of what settings you are attempting to "Produce". Are you using a profile that supports hardware encoding?
Jeff