Radeon HD 6990M Crossfire and GeForce 940MX - video card comparison
Radeon HD 6990M Crossfire
GeForce 940MX
Architecture
Terascale 2 (2009−2015)
Maxwell (2014−2018)
GPU code name
Blackcomb XTX
N16S-GTR-B/S
Market segment
Laptop
Laptop
Release date
July 2011
March 2016
Bus support
-
PCI Express 3.0
Interface
-
PCIe 3.0 x8
Supplementary power connectors
-
None
Boost clock speed
-
1242 MHz
Core clock speed
715 MHz
1122 MHz
Floating-point performance
-
762.6 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
2x1700 Million
1,870 million
Pipelines / CUDA cores
2240
384
Power consumption (TDP)
-
23 Watt
Texture fill rate
-
23.83
Memory type
GDDR5
DDR3, GDDR5
Maximum RAM amount
2x2 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
900 MHz
4000 MHz
Memory bandwidth
-
40.1 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
11
12 (11_0)
CUDA
-
+
OpenCL
-
1.2
OpenGL
-
4.5
Shader Model
-
5.1
Vulkan
-
1.1
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+