I purchased 2 different WH08LS20 drives one retail and one the OEM WH08LS20K version. Neither of them run even close to the rated speeds, the Blu-Ray runs at 1x-2x and the DVD transfer rates are 1x-2x. CD transfer rates is also extremely slow. Tried a different SATA cable, restoring defaults in BIOS, switching to antother SATA port, nothing. Hard drive is working fine. Really frustrating, let me know if you have any ideas as to wheter it is a software issue or I should replace the drive. Using Windows 7 64-Bit Home Premium.