GeForce GT 640M and GeForce 9400M - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce 9400M
GeForce GT 640M
946
GeForce 9400M
104
GeForce GT 640M
GeForce 9400M
Architecture
Kepler (2012−2018)
Tesla (2006−2010)
GPU code name
N13P-GS
C79
Market segment
Laptop
Desktop
Release date
March 2012
October 2008
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
580 MHz
CUDA cores
384
-
Floating-point performance
480.0 gflops
-
Manufacturing process technology
28 nm
65 nm
Number of transistors
1,270 million
314 million
Pipelines / CUDA cores
384
16
Power consumption (TDP)
32 Watt
12 Watt
Texture fill rate
Up to 20.0 billion/sec
4.640
Memory type
DDR3\GDDR5
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
128bit
System Shared
Memory clock speed
1800 - 4000 MHz
System Shared
Memory bandwidth
Up to 64.0 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11.1 (10_0)
CUDA
+
-
OpenCL
1.1
N/A
OpenGL
4.5
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
Optimus
+
-