Issue one, the system will not boost, it keeps turning on and off for so many times, not even loading into Windows, that is with my G41 Gigabyte board. Am I experienced a comparability issue right now?? I am using another system to test to find where that is the card issue or not, but it works fine with other board.
Issue two, I am not sure about the directx 11, it says it supports directx 11 on the box and manual book, but after boosting with other machine; I found out that it only has directx 10. Originally I thought that might be a system error, but I did some researches on AMD official site it says 4550 only supports directx 10.
For the compatibility problem make sure everything's connected properly. It should only support DirectX 10.1 as only the HD 5000 series supports DirectX 11, from ATi's side anyway. The Mobility Radeon HD 5100 don't support DirectX 11 though.