GeForce GT 640M and Radeon HD 7640G + HD 7670M Dual Graphics - video card comparison
GeForce GT 640M
Radeon HD 7640G + HD 7670M Dual Graphics
Architecture
Kepler (2012−2018)
Terascale 3 (2010−2013)
GPU code name
N13P-GS
-
Market segment
Laptop
Laptop
Release date
March 2012
May 2012
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x16
-
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
655 / 600 MHz
CUDA cores
384
-
Floating-point performance
480.0 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
-
Pipelines / CUDA cores
384
736
Power consumption (TDP)
32 Watt
-
Texture fill rate
Up to 20.0 billion/sec
-
Memory type
DDR3\GDDR5
-
Maximum RAM amount
2 GB
-
Memory bus width
128bit
128 Bit
Memory clock speed
1800 - 4000 MHz
1800 MHz
Memory bandwidth
Up to 64.0 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11
CUDA
+
-
OpenCL
1.1
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
3D Blu-Ray
+
-
Optimus
+
-