Binoculars,
Your computer should be able to burn without issues, you have the horsepower to do so.
Do make sure you have the latest Drivers for your motherboard. In your Device Manager make sure you are in DMA and not PIO Mode for the Lite-On, it will make that much of a difference.
If you have all that setup correctly and it is still slow, try changing media. (Make it name brand media.)
Take Care,
Richard
P.S. Almost forgot, disable any Antivirus Programs when burning.