That looks like Ritek R03 media.
Your only chance to burn it at 8x is Herrie's hacked firmware, which you can find in the following thread.
However, the writing quality is extremly poor at all speeds, so I recommend you stick with stock 1.06 firmware and burn at 4x. Otherwise, your burns will be of poor quality (probably still readable however).
Herrie's opinion is that R03 is not of sufficient quality to burn well at 8x. I tend to disagree, but there isn't a good enough write strategy out there for them yet unfortunately.