.. I need the Sony version firmware for the GCE-8400B because I have a Sony OEM drive. My drive is having problems recording at optimal speed (it is recording at 16x max, 40x is the optimal). The drive will erratically use up CPU power limiting the drive's optimal speed. I had a bad firmware upgrade from Sony's datebase of updates for their computers, which leads me to believe that this might have cause the drive to malfunction. Any help would be appreciated. Thanks.