sempron s754 2800+ at 1.85ghz
1024mb 2-3-2-6 at 183mhz
coreavc pro 188.8.131.52 YV12 (cant run all my videos without switching to RGB32 in 184.108.40.206)
can play all 720p h264 with deblocking off, only with coreavc and cpu usage is usually around 90% with higher bitrate videos. h264 acceleration works with powerdvd 7.3 h264 in that I get about 30% less cpu usage (in drivers 93.81 and older only, newer remove non mpeg2 acceleration in xp) but vmr9 reports a constant 21fps instead of 24 even though cpu usage is ~30%. Planet earth UK 720p mkv hddvd rips play fine, but I need a bit more cpu for deblocking planet earth and dvd9 8gb x264 hddvd rips.
sempron 3100+ s754 at 2.6ghz
1024mb 2-2-2-5 183mhz
x850xt PE pci-e
everything I've thrown at it plays fine with coreavc with full deblocking but I haven't played any h264 over 17mbps.
a64 3400+ s939 at 2.8ghz
1024mb 2-2-2-5 at 227mhz
1tb raid 0
everything plays fine, even using rgb32.
keep in mind these are in MCE2005 while its recording tv in the background at ~15% cpu usage and at 1366x768 resolution. hope it helps.