Sony DVD writer slows down

[lets]

I have an external Sony DVD writer with number 500 (max speed 4-x). It took me 15 min to burn DVD. Oh, OK, it was before I installed Windows XP prof. It's a Sony brand computer, that came with Win XP Home Ed. I reformated hard drive, so I could get rid of "sony stuff". Now, computer works much better, but not for DVD writer, I updated firmware, I installed service pack for Windows, I even installed Windows XP from different CD, but anyway, it takes me 30-40 min to burn DVD. I use the same media (Memorex, Fujim, TDK) and the same software (Record Now). So, how can I burn my DVDs faster?

[Capmaster]

SOunds like it dropped from 4X to 2X.

Check the IDE controller advanced settings in device manager and verify the transfer mode is UltraDMA and not PIO.