The product descriptions, features and performance results are for graphics cards based on AMD´s standard reference design for the ATI Radeon™ HD 4550 with DDR3 memory, 800MHz memory speed and 600MHz engine speed. Third party manufacturers may modify these reference designs, which can result in product specifications, features and/or performance results different from those described in this document. Buyers should confirm exact specifications, features and performance of third party graphics cards before purchase.
ATI PowerPlay™, ATI Avivo HD and ATI Stream™ are technology platforms that include a broad set of capabilities offered by certain ATI Radeon GPUs. Not all products have all features and full enablement of some capabilities may require complementary products.
ATI Radeon™ HD graphics chips have numerous features integrated into the processor itself (e.g., HDCP, HDMI, etc.). Third parties manufacturing products based on, or incorporating ATI Radeon HD graphics chips, may choose to enable some or all of these features. If a particular feature is important to you, please inquire of the manufacturer if a particular product supports this feature. In addition, some features or technologies may require you to purchase additional components in order to make full use of them (e.g. a Blu-Ray or HD-DVD drive, HDCP-ready monitor, etc.).