GSA 4040b suddenly burns everything slow



I have owned my OEM GSA-4040b for about 18 moths with a few hundred successful burns (CD and DVD) at appropriate speeds. A little while ago I bought a pack of Ritek G-05’s (8x) and noticed that they only burned at 2x, while my memorex, maxell (8x) usually burn at 4x. So I dried upgrading the firmware, and that didnt help, so I tried a good ol’ Memorex and found that it burned at only 2x!! then i burned a CD on a Fuji disc and it only burned at 4x. I went to nero infotool and it only gave me the 2x option. Is there any way to just put it back to normal before I changed firmware or started using G-05’s or just make everything ok???

Thank you.