Originally Posted by OzHDHT
Dang and to think in building 2 separate new HTPC's in the last month for different 4K projector setups and I ended up putting an R290 in one and R290X in the other.
I've never had any issue with perfectly accurate 23.976 with any AMD cards since my initial 7950 after several generations of Nvidia (can't remember what gen ATI Radeon I would have had before that).
On the issue of settings for upper end AMD. I've experimented but really just followed Renethx's suggestions for level 5 and can't help wondering with there not being that many guys out there with say the 290X in their system, what settings would push things to the limit with 1080p playback of 720p and 1080p files (hamstrung by AVR since getting rid of Denon 4520 for McIntosh MX)?
Quoted from Guru3d.com R9 285 review ""The Radeon R9 285 is AMD’s first discrete GPU with a redesigned fixed-function decoder (UVD – Unified Video Decoder) that supports full hardware decode of 4K H.264 videos. This next generation UVD supports H.264 base, main and high profile, up to level 5.2. The chart below shows the benefit of having a fixed-function decoder :
The primary benefit of having a fixed-function decoder, especially for high bit-rate 4K content, is the significantly reduced CPU utilization. This results in a more responsive system, lower battery life ( for mobile products ) and more importantly, the system will not exhibit any skipped frames during playback.
The AMD Radeon R9 285 also features a redesigned fixed-function encoder ( VCE - Video Coding Engine ) that supports full hardware encoding to H.264 format. This version of VCE supports encoding to H.264 baseline and main profiles. The main use case for VCE is transcoding, which is very useful when the user wants to save on storage space as well as allow older, lower power devices (such as handhelds, laptops, etc.) to decode and playback their content at lower resolutions and/or lower bit-rate. The VCE works in concert with the powerful UVD in the Radeon R9 285 to accelerate the transcoding pipeline. The chart below shows the performance uplift expected compared to the competition:""