GeForce GT 640M and GeForce 9400 GT - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce 9400 GT
GeForce GT 640M
946
GeForce 9400 GT
148
GeForce GT 640M
GeForce 9400 GT
Architecture
Kepler (2012−2018)
Tesla (2006−2010)
GPU code name
N13P-GS
G96C
Market segment
Laptop
Desktop
Release date
March 2012
August 2008
Bus support
PCI Express 2.0, PCI Express 3.0
PCI-E 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
None
SLI options
-
+
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
550 MHz
CUDA cores
384
16
Floating-point performance
480.0 gflops
29.376 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
314 million
Pipelines / CUDA cores
384
16
Power consumption (TDP)
32 Watt
50 Watt
Maximum GPU temperature
-
105 °C
Texture fill rate
Up to 20.0 billion/sec
4.4 billion/sec
Memory type
DDR3\GDDR5
DDR2
Maximum RAM amount
2 GB
512 MB
Memory bus width
128bit
128 Bit
Memory clock speed
1800 - 4000 MHz
400 MHz
Memory bandwidth
Up to 64.0 GB/s
12.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
Dual Link DVI
Multi monitor support
-
+
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
2048x1536
Audio input for HDMI
-
S/PDIF
DirectX
12 API
11.1 (10_0)
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
2.1
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
Optimus
+
-