The TechZone has posted a review of the PowerColor X1550.

Part of the irony of this, though, is because the PowerColor X1550 is an entry-level card, it very rarely actually makes full use of the 512MB of dedicated graphics memory: the rest of the card can't exactly keep up. If you're hoping to achieve the same kinds of results as cards that cost three or four times the asking price of the $99 X1550, you're going to be sorely disappointed. By contrast, if you're a light gamer or you're willing to run your first-person shooters and other graphic intense games at less than their maximum capable resolutions and frame rates, the PowerColor X1550 will certainly save you a few bucks while still being able to do an adequate, budget-minded job.

PowerColor X1550 Review