Genuine Apple iMac A1311 Radeon HD 6750M 512MB GPU with Heatsink, Tested

This listing is for a Genuine Apple / AMD Radeon HD 6750M 512MB Video Card (GPU) with original heatsink assembly, compatible with iMac 21.5-inch A1311 (EMC 2428, Mid 2011).

The GPU has been fully tested, including:

• Booting to macOS

• Stress test under load

• Thermal performance and fan curve

• External monitor output

• Artifact-free video playback

This is an ideal replacement for an iMac suffering from:

• No display

• Artifacts or lines

• GPU crash/restart issues

• Overheating GPU

⚙️ Specifications:

• Brand: Apple / AMD

• Model / Chipset: Radeon HD 6750M

• VRAM: 512MB GDDR5

• Form Factor: iMac 21.5" A1311 dedicated GPU module

• Includes: GPU + Apple OEM heatsink

• Condition: Used – Fully Tested & Working

✴️ Compatibility & Additional Information:

🔹 Compatible iMac Model:

• iMac (21.5-inch, Mid 2011) – A1311, EMC 2428

🔹 Compatible GPU Options for This Model:

• Radeon HD 6450M (256MB)

• Radeon HD 6750M (512MB) ← this listing

• Radeon HD 6770M (512MB)

🔹 Notes:
This GPU is specifically for 21.5-inch iMac A1311 and does not fit 27-inch models or other years.

Installation Tip:
iMac GPUs require precise thermal paste application and proper heatsink tightening. Professional installation is recommended.

⚠️ Notes:

• Pulled from a fully working machine before part-out.

• No artifacts, no freezing, no display corruption.

• Heatsink included; thermal paste should be replaced during installation.

• Not compatible with A1312 (27"), A1418, or A1419 iMacs.