Intel H55 chipset includes FDI; display core is known as GMA HD
In order to take advantage of the graphics core in the Clarkdale processor, the CPU must be paired up with H55 chipset. Basically H55 is simliar to P55, bridging the interconnecting devices using 2Gb/s DMI connect.
H55 includes FDI (Flexible Display Interface), allowing direct connection between the CPU and the Graphics core. This allows the display information to be sent back to the H55 chipset for output.
In fact, the graphics core inside the Clarkdale processor is known as GMA HD. In comparison with G45 GMA X4500HD, the difference is the number of Unified shaders. It is increased from 10 to 12. It only supports DX10 (not DX10.1,DX11) and SM 4.0.