iMac12,2

iMac (27-inch, Mid 2011)iMac2011EFI 64-bitno security chip

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iMac12,2 HD 6770M HD 6970M 0 of 2 configurations tested Cards Matrix

Criterion	HD 6770M	HD 6970M	Config count
Boot · a failure here makes a config Unsupported 0 of 6 passed
Stock installer boots via 64-bit EFI	Untested	Untested	2
Internal storage detected and installation completes	Untested	Untested	2
Installed system starts, restarts and shuts down cleanly	Untested	Untested	2
Graphics 0 of 4 passed
Discrete GPU acceleration	Untested	Untested	2
External display output	Untested	Untested	2
Display 0 of 4 passed
Internal display at native resolution	Untested	Untested	2
Display brightness control	Untested	Untested	2
Input 0 of 2 passed
IR receiver (Apple Remote)	Untested	Untested	2
Power 0 of 2 passed
Sleep and wake	Untested	Untested	2
Audio 0 of 14 passed
Built-in speakers	Untested	Untested	2
Built-in microphone	Untested	Untested	2
Headphone / analog audio output	Untested	Untested	2
Line-in / analog audio input	Untested	Untested	2
Optical digital audio output	Untested	Untested	2
Optical digital audio input	Untested	Untested	2
Audio over HDMI / DisplayPort	Untested	Untested	2
Camera 0 of 2 passed
Built-in webcam	Untested	Untested	2
Networking 0 of 6 passed
Wi-Fi	Untested	Untested	2
Bluetooth	Untested	Untested	2
Ethernet	Untested	Untested	2
Ports 0 of 8 passed
USB-A ports	Untested	Untested	2
Thunderbolt devices (storage, docks, hotplug)	Untested	Untested	2
FireWire	Untested	Untested	2
SD card reader	Untested	Untested	2
Storage 0 of 2 passed
Internal optical drive reads discs	Untested	Untested	2
Thermal 0 of 4 passed
Temperature sensors report under load	Untested	Untested	2
Fans respond to load	Untested	Untested	2

Research notes (unverified)

The Sandy Bridge CPU's integrated GPU is visible to Linux (8086:0102, i915) but does not drive any output; the AMD GPU does.

Sources (7) and identifiers

Board IDs: Mac-942B59F58194171B