FUD Zilla heard Intel's Arrandale processors will feature HD Graphics Turbo Boost technology, this feature will overclock the 45nm graphics part of the processor from 166MHz to 500MHz:
In perspective, it works very similar to the Turbo Boost mechanism introduced in Intel's Nehalem architecture. For instance, if two cores in a quad-core processor are idle, the PowerGate transistors that feed the cores their supply current are turned off, and power is redistributed to the two active cores which can be automatically overclocked all the way to 2.26GHz. This feature will be possible on the Core i5 640UM.
Similarly, the HD Graphics Turbo feature found in Arrandale-based processors will boost graphics from default the 166MHz to an impressive 500MHz when it becomes necessary. This is a threefold speed increase and it should be enough for some basic 3D gaming and definitely enough for some high definition Blu-ray quality content playback.