AMD Introduces the ATI Radeon HD 4600 Series | HotHardware
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ATI Radeon HD 4850 Preview: AMD Delivers Performance for the Masses
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Sapphire Radeon HD 4890 1GB OC: reviews
AMD ATI Mobility Radeon HD 4860 - NotebookCheck.net Tech
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AMD Radeon HD 4870 Review - Gaming Nexus
Scaling New Heights - ATI Radeon HD 4850 512MB GDDR3 - HardwareZone.com.sg
ATI Radeon HD 4850 review | TechRadar
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Radeon HD 4850 and 4870 CrossfireX - 1 - A Ruby Introduction
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