Radeon HD 7970M Crossfire and Radeon HD 6990M Crossfire - video card comparison
Radeon HD 7970M Crossfire
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
Core clock speed
850 MHz
715 MHz
Manufacturing process technology
28 nm
40 nm
Number of transistors
-
2x1700 Million
Pipelines / CUDA cores
2560
2240
Power consumption (TDP)
200 Watt
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
-
2x2 GB
Memory bus width
2x 256 Bit
256 Bit
Memory clock speed
4800 MHz
900 MHz
Shared memory
-
-
DirectX
11.1
11