Summary: The HIS Radeon HD 5450 is being what it is - an entry-level graphics card from this generation, suited as a step up from clumsy integrated graphics which can't handle Windows Aero UI, common 3D applications such as Google Earth, Cooliris/Piclens, etc. It can also play any game better than you'd expect this generation's integrated graphics chipsets to.
Pros: Passive cooled, Low-profile, single slot, Minimal power draw, Improvements to HDMI audio. 7.1 ch HDMI audio with Dolby, DTS, Native HDMI, 40 nm GPU, Support for DirectX 11
Cons: High Price, Low 3D performance, No GDDR5 memory, No support for CUDA/PhysX