Radeon HD 6970M Mac Edition and Radeon R9 M390 Mac Edition - video card comparison
Radeon HD 6970M Mac Edition
Radeon R9 M390 Mac Edition
Architecture
TeraScale 2 (2009−2015)
GCN 1.0 (2012−2020)
GPU code name
Blackcomb
Pitcairn
Market segment
Desktop
Desktop
Release date
August 2011
May 2015
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
None
Core clock speed
680 MHz
958 MHz
Floating-point performance
1,305.6 gflops
-
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
2,800 million
Pipelines / CUDA cores
960
1024
Power consumption (TDP)
75 Watt
80 Watt
Texture fill rate
32.64
61.31
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
3600 MHz
5.5 GB/s
Memory bandwidth
115.2 GB/s
174.7 GB/s
Display Connectors
No outputs
No outputs
DirectX
11.2 (11_0)
12 (11_1)
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.2