Look at the Computer Required for Blu-Ray Discs

[johnnymk]

This is for a Lite-On burner that CompUSA is selling.
I am not sure if these requirements are also for burning discs.

For High Definition BD Playback & Authoring: ( Only Windows XP SP2 ) Pentium D 3.4GHz or faster CPU and 1GB or higher RAM are required


HDCP capable graphics card with 256MB RAM, PCI Express x16, 1920x1200 resolution, 32bit color GPU : nVidia GeForce 6600GT / 7600GT / 7800GTX512 / 7900GX2 / 7900GTX / 7950GX2 and ATI X1600 / X1800 / X1900 series are recommended

[Devhux]

Sounds about right -- HD takes a lot of processing power. Granted, if you have one of the latest video cards (like a Geforce 8600), you could get by with a slightly slower processor (that card handles onboard H.264/VC1 decoding).

[redcolours]

HD playback - the only reason to upgrade your PC.