The Radeon HD 4350 and 4550 are slotted in between integrated graphics and the set of hardware we took a look at recently in our Radeon 4670 review. The Radeon HD 4550 will run you around $45 - $55, while the Radeon HD 4350 will be priced at $39. Generally speaking, if you're a gamer you're not spending any less than $150 for a graphics card - so these GPUs are mostly for enabling hardware Blu-ray acceleration or providing a boost in performance over games running on integrated graphics.
Both the 4550 and 4350 are mated with a 64-bit memory interface and either a DDR2 or DDR3 frame buffer. With very little memory bandwidth, and very little processing power you need to have good expectations for these cards.