I've been burning some +R 4x tdk (ricoh) media fine but just received a spindle of ritek +R 8x yesterday. The 4x burned great around 30 minutes to back up some dvd movies but the 8x ritek took about 8 hrs and was only 66% done. I even tried a liteon +R 8x (ricoh) that came with my burner and it was the same. I am using liteon 851s with dvd shrink 3.1. I was on GS0F and moved to GS0H thinking that might help but both firmware acted the same way. Could it be the 8x media although my burner is rated at 8x? Any suggestions would be great. Thanks in advance.