I thought that the 5450 wasn't supposed to launch until early February... But, lo and behold, it's listed on SuperBiiz. Mistake by SuperBiiz? Or is it launching early?
Both GPUs should decode a single stream 1080p Blu-ray movie without any issues, offloading 100% of the decode pipeline to the GPU; we confirmed that the 4550 works as expected and we're assuming the 4350 is the same given that the hardware is identical.