Intel Westmere Architecture & Clarkdale Preview @ PC Perspective

"Both Clarkdale and Arrandale (the mobile variant) will have support for Turbo Mode for the CPU cores but the Arrandale offering will also include an interesting twist on the technology, integrating the GPU in the mix.  With a fixed TDP, the processor will either accelerate the GPU or CPU cores depending on the work load - while gaming the GPU will able to "steal" some of the overall TDP to increase its clock speed and vice-versa."