I Just got the latest Aopen 56 speed CD ROM drive to replace an aging 40 speed i have. Benchmarking on SiSoft the drive runs a max of 6 speed. I have no idea why. Its got a jumper on the back to enable/disable UDMA 33. This makes no diffrence to the speeds The old 40 speed & DVD & CDRW all hammer away near there top speeds but not this drive. Do i have a faulty one ? So far i have tried running this in all modes but nuttin .