What is difference between amd dual-core e-350 and AMD dual-core E-450 e-450?

The E450 has a clock speed of 1.65GHz, slightly faster than the 1.6GHz E350.

But the more significant differences are in the integrated graphics and memory controller of each. The AMD Radeon HD 6310 paired with the E350 has a core speed of 500MHz. The AMD Radeon HD 6320 that comes with the E450 has a core speed of 500MHz also, but it has a turbo function that increases it up to 600MHz when needed. The memory controller with the E350 can only handle DDR3-1066 memory, but the E450 can handle faster DDR3-1333.