I was unsure about the GPU effective memory clock.. please forgive my lack of knowledge. 1st build had a lot of fun building it. Ran into one problem when building, that was after everything was installed and and connected. I booted up and recieved a fatal error screen I had no idea it was such a simple fix but it took me an hr to figure it out. I turned the pc off unplugged PSU from wall and did a quick visual check on all components that could be removed easily. It turned out to be my GPU that was causing the failure. After a sound inspection I reinstalled the GPU. PC booted right up. Was a good learning experience.