Radeon HD 6970M Mac Edition and Radeon HD 6770M Mac Edition - video card comparison
Radeon HD 6970M Mac Edition
Radeon HD 6770M Mac Edition
Architecture
TeraScale 2 (2009−2015)
TeraScale 2 (2009−2015)
GPU code name
Blackcomb
Whistler
Market segment
Desktop
Desktop
Release date
August 2011
January 2011
Interface
MXM-B (3.0)
MXM-A (3.0)
Supplementary power connectors
None
-
Core clock speed
680 MHz
725 MHz
Floating-point performance
1,305.6 gflops
696.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
1,700 million
716 million
Pipelines / CUDA cores
960
480
Power consumption (TDP)
75 Watt
35 Watt
Texture fill rate
32.64
17.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
3600 MHz
3600 MHz
Memory bandwidth
115.2 GB/s
57.6 GB/s
Display Connectors
No outputs
No outputs
DirectX
11.2 (11_0)
11.2 (11_0)
OpenCL
1.2
1.2
OpenGL
4.4
4.4
Shader Model
5.0
5.0
Vulkan
N/A
N/A