I have Athlon 64 X2 4500+, and integrated Radeon 3200 chipset with UVD. Bluray, and MKV 1080p content plays back fine. However, my new Sony camera captures 1080i video in .MTS (AVCHD) format and the playback is choppy. I've tried WMP, WMC, VLC, MPC-HC and all are choppy. Surprisingly WMP and WMC are less choppy compared to VLC and MPC-HC. What's my best way to get some smooth playback? May an upgrade to the new Radeon cards with UVD3 be helpful? And related to this - is UVD3 in all Radeon chipsets the same? - i.e. not effected by the 3D clock rate or video memory? My machine is solely used as HTPC. Thanks.