GeForce GT 640 and GeForce GTX 280M - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce GTX 280M
GeForce GT 640
1209
GeForce GTX 280M
592
GeForce GT 640
GeForce GTX 280M
Architecture
Kepler (2012−2018)
G9x (2007−2010)
GPU code name
GK107
N10E-GTX
Market segment
Desktop
Laptop
Release date
June 2012
March 2009
Bus support
-
PCI-E 2.0
Interface
PCIe 3.0 x16
MXM-IV
Supplementary power connectors
None
-
SLI options
-
+
MXM Type
-
MXM 3.0 Type-B
Core clock speed
902 MHz
585 MHz
CUDA cores
-
128
Floating-point performance
692.7 gflops
374.5 gflops
Gigaflops
-
562
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
754 million
Pipelines / CUDA cores
384
128
Power consumption (TDP)
65 Watt
75 Watt
Texture fill rate
28.86
38 billion/sec
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
Up to 950 MHz
Memory bandwidth
28.51 GB/s
61 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
HDMIDual Link DVISingle Link DVIDisplayPortLVDSVGA
HDMI
+
+
Maximum VGA resolution
-
2048x1536
Audio input for HDMI
-
S/PDIF
DirectX
12 (11_0)
11.1 (10_0)
CUDA
3.0
+
OpenCL
1.2
1.1
OpenGL
4.6
2.1
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A
Power management
-
8.0