Radeon HD 6990M Crossfire and GeForce GTX 670MX SLI - video card comparison
Radeon HD 6990M Crossfire
GeForce GTX 670MX SLI
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Blackcomb XTX
N13E-GR
Market segment
Laptop
Laptop
Release date
July 2011
October 2012
SLI options
-
+
Core clock speed
715 MHz
600 MHz
Manufacturing process technology
40 nm
28 nm
Number of transistors
2x1700 Million
5080 Million
Pipelines / CUDA cores
2240
1920
Power consumption (TDP)
-
150 Watt
Memory type
GDDR5
GDDR5
Maximum RAM amount
2x2 GB
-
Memory bus width
256 Bit
2x 192 Bit
Memory clock speed
900 MHz
2800 MHz
Shared memory
-
-
DirectX
11
11
CUDA
-
+
Optimus
-
+