Radeon HD 7970M and Radeon HD 6990M Crossfire - video card comparison
Radeon HD 7970M
Radeon HD 6990M Crossfire
Architecture
GCN (2011−2017)
Terascale 2 (2009−2015)
GPU code name
Wimbledon XT
Blackcomb XTX
Market segment
Laptop
Laptop
Release date
May 2012
July 2011
Interface
MXM-B (3.0)
-
Supplementary power connectors
None
-
Core clock speed
850 MHz
715 MHz
Floating-point performance
2,176 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
2x1700 Million
Pipelines / CUDA cores
1280
2240
Power consumption (TDP)
100 Watt
-
Texture fill rate
68.00
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2x2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
4800 MHz
900 MHz
Memory bandwidth
153.6 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
DirectX
12 (11_1)
11
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
1.2.131
-