Racing on Need For Speed: Undercover, noticed a number of white/blank section of the map.

The game then 'freezing' and blue tinting, the blank sections would then load. Game continues.

I quickly came to the conclusion: the car was too fast for the processor or that the graphics were too high. After researching this issue, it appears that this game gives requires alot of processor power. But an optimizer for processes is available for some.