Should an 851s burn RICOHJPNR01 at 8X with GSOK?

I have an 851s that won’t burn a RICOHJPNR01 disc at 8X. My 811 burns them at 8X with the latest firmware from Liteon (HSOR).

Is this right?

Open the firmware with omnipatcher, click on the media code and it will tell you that 4x is the default speed. If you want to change this, apply the recommended tweeks or perform the wanted changes manually (or upgrade to a 832 firmware from the codeguys page).