AMD Radeon HD 6770M 109-C29557-00-GFX GDDR5 for iMac A1311, A1312 Computers

The AMD Radeon HD 6770M 109-C29557-00-GFX is a dedicated mobile graphics card designed as a replacement video board for compatible Apple iMac computers from the 2011 generation. It features AMD Radeon HD 6770M graphics processing with 512MB of GDDR5 video memory and uses an MXM-style graphics card design. The board is associated with Apple iMac models A1311 and A1312 and is used as a service replacement for systems equipped with compatible Radeon HD 6770M graphics. The card provides dedicated graphics processing for display output, desktop applications, multimedia, and supported graphics workloads. It is a practical replacement component for restoring graphics functionality in compatible iMac systems rather than a complete computer. Compatibility should be confirmed against the exact iMac model, EMC number, original graphics card, board layout, and firmware before installation. Listings for this board identify the 109-C29557-00 designation and Radeon HD 6770M 512MB GDDR5 configuration.