Radeon HD 6770M and Radeon HD 6970M Mac Edition - video card comparison
Radeon HD 6770M
Radeon HD 6970M Mac Edition
Architecture
Terascale 2 (2009−2015)
TeraScale 2 (2009−2015)
GPU code name
Whistler-XT
Blackcomb
Market segment
Laptop
Desktop
Release date
January 2011
August 2011
Interface
MXM-A (3.0)
MXM-B (3.0)
Supplementary power connectors
-
None
Core clock speed
675 / 725 MHz
680 MHz
Floating-point performance
696.0 gflops
1,305.6 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
716 million
1,700 million
Pipelines / CUDA cores
480
960
Power consumption (TDP)
35 Watt
75 Watt
Texture fill rate
17.40
32.64
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
800 MHz
3600 MHz
Memory bandwidth
57.6 GB/s
115.2 GB/s
Shared memory
-
-
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