"The HD 4830 512MB is obviously a strong contender in this area and puts the GeForce 9800 GT on notice becoming the best card you can get for less than $130. In our gaming tests I saw the HD 4830 clearly outpace the GeForce 9800 GT in both Call of Duty 4 and Crysis, two games that are usually quite favorable to NVIDIA's GPUs and drivers. Bioshock also performed well on the HD 4830 but the tests at 2048x1536 indicate to me that the cards are about equal in this title."
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Source: PC Perspective
