The good news is the card fitted but only after i removed the tooless clamps from the case, the height of the card was an issue!
Sadly, there is bad news. I used DDU to uninstall the drivers for my old gpu, installed the new card, downloaded and installed the latest drivers. However, I'm getting a black screen after just a few minutes of booting to the desktop and then my monitor goes into standby as it doesn't think it is connected to anything!

My PC doesnt shut down.
I'm at a loss and have gone back to my old gpu for tonight. Anyone have any ideas as to what the problem might be?