Radeon HD 6970M and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon HD 6970M vs GeForce GT 640M
Radeon HD 6970M
2338
GeForce GT 640M
946
Radeon HD 6970M
GeForce GT 640M
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Blackcomb XT
N13P-GS
Market segment
Laptop
Laptop
Release date
January 2011
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
-
Boost clock speed
-
645 MHz
Core clock speed
680 MHz
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
1,305.6 gflops
480.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,270 million
Pipelines / CUDA cores
960
384
Power consumption (TDP)
75-100 Watt
32 Watt
Texture fill rate
32.64
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
900 MHz
1800 - 4000 MHz
Memory bandwidth
115.2 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
11.2 (11_0)
12 API
CUDA
-
+
OpenCL
1.2
1.1
OpenGL
4.4
4.5
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126
3D Blu-Ray
-
+
Optimus
-
+