http://www.thg.ru/graphic/ati_avivo_nvidia_purevideo/index.html
visu pirma kad nekiltu klausimu nemaisom purevideo su purevideo HD, antra 
perskaitom idemiai cia:
http://www.nvidia.com/object/purevideo_hd_faq.html#2Q10

Q. What do I need to have the best experience playing Blu-ray or HD DVD 
movies on a PC?
To enjoy the ultimate HD DVD or Blu-ray experience on a PC, you’ll need:
PCI Express graphics card with secure HDCP CryptoROM and GeForce 7 Series 
HDCP-capable GPU with 256MB of graphics memory or GeForce 8 Series 
HDCP-capable GPU with 128MB of graphics memory
NVIDIA ForceWare graphics drivers that feature PureVideo HD technology
An optical disc drive that supports Blu-ray and/or HD DVD movie playback
Blu-ray or HD DVD movie player software with PureVideo HD hardware 
acceleration of H.264, VC-1, and MPEG-2 high-definition content
A dual-core CPU is recommended with the GeForce 7 Series
1GB of system memory is recommended under Windows
XP; 2GB is recommended under Windows Vista
apie ATi cia:
http://ati.amd.com/technology/avivo/features.html

na isvadas rasit straipsnio gale :)