Ritek Ridata G05 8X DVD-R and i'm using a Sony DRU-530A burner. http://www.meritline.com/ritek-8x-dvd-r-dvdr-silver-blank-media-discs1.html
Not too familiar with Ridata G05 8X -R. But am very familiar with Ridata G04 4x -R and they work perfectly for me and my liteon851s & NEC 2500a. Heres is a link that may assist you & thanks for the 8X link. http://www.digitalfaq.com/media/dvdmedia.htm