Copied this from Notebook check.
"Compared to the predecessor GMA X3100, the GMA 4500MHD has two more shaders and a 33 MHz higher core clock speed. Therefore, the chip is noticable faster than the older one (especially in 3DMark06). Still, the performance is just on par with the entry level dedicated graphics cards and therefore not suited for demanding games. Some older games like Fear can be played in low details and low resolutions.
Compared to other modern integrated graphic cards like the Nvidia GeForce 9400M (G 102MNVIDIA GeForce G 105M) or AMD ATI Radeon HD 3200, the GMA 4500M HD noticably slower and provides less optimized drivers for games."
This chipset is DX10 compatible. 3D and HD are no problem. Runs movies smoothly. It's only problem is running newer high graphic games such as COD4. Civ5 will probably not require super fast frame rates. I'm leaning towards this being OK for Civ5. probably not on the highest setting, but........ We will only know for sure when the system requirements are posted by 2K.
However one of the devs was quoted as saying. "We've made the engine/programming stuff so damn efficient we can have thousands of animated characters on screen at any one time while Civ IV struggled with 100.... oh and by the way, we can make the game run on integrated graphics"