hi was about to get the most out of my pathetic ati xt1300. saw the new catalyst 9.1. read the release notes
and it says under known problems

The ATI Avivo video transcoder does not currently use GPU acceleration

under Windows Vista 64-bit edition

would you now install the driver? or not. or has this been a problem all along>?

link https://a248.e.akamai.net/f/674/9206/0/www2.ati.com/gamesite/Catalyst_91_release_notes.pdf