NVIDIA GeForce GT 640M vs NVIDIA GeForce 820M
NVIDIA GeForce GT 640M
NVIDIA GeForce 820M
|
384 Shaders
1GB GDDR5
625MHz
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96 Shaders
2GB DDR3
719MHz
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FP32
0.48 TFLOPS
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FP32
0.37 TFLOPS
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-
-
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-
-
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Form Factor
Soldered
-
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Form Factor
Soldered
-
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TDP
32W
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TDP
15W
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-
-
-
-
-
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-
-
-
-
-
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GB5 OpenCL - N/A
0%
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GB5 OpenCL - N/A
0%
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GB5 CUDA - N/A
0%
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GB5 CUDA - N/A
0%
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GB5 Metal - N/A
0%
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GB5 Metal - N/A
0%
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GB5 Vulkan - N/A
0%
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GB5 Vulkan - N/A
0%
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OCT 2020.1 - N/A
0%
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OCT 2020.1 - N/A
0%
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OCT Metal - N/A
0%
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OCT Metal - N/A
0%
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Manufacturer
NVIDIA
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Manufacturer
NVIDIA
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Chip Designer
NVIDIA
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Chip Designer
NVIDIA
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Architecture
Kepler
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Architecture
Fermi
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Family
GeForce 600
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Family
GeForce 800
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Codename
NVE7
GK107
Variant
N13P-GS
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Codename
NVD7
GF117
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-
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Market Segment
Laptop
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Market Segment
Laptop
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Release Date
3/22/2012
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Release Date
2/1/2014
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Foundry
TSMC
-
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Foundry
TSMC
-
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Fabrication Node
28nm
-
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Fabrication Node
28nm
-
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Die Size
118 mm²
-
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Die Size
116 mm²
-
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Transistor Count
1.3 Billion
-
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Transistor Count
585 Million
-
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Transistor Density
10.76M/mm²
-
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Transistor Density
5.04M/mm²
-
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Form
Soldered
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Form
Soldered
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Shading Units
384 Shaders
-
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Shading Units
96 Shaders
-
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Texture Mapping Units
32 TMUs
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Texture Mapping Units
16 TMUs
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Render Output Units
16 ROPs
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Render Output Units
4 ROPs
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-
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-
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-
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-
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Streaming Multiprocessors
2 SMs
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Streaming Multiprocessors
2 SMs
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-
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-
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-
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-
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-
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-
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625MHz
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1908MHz Shader
719MHz Base
719MHz
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-
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-
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-
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-
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-
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-
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FP32
0.48 TFLOPS
|
FP32
0.37 TFLOPS
|
|
-
-
|
-
-
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FP64
0.02 TFLOPS
-
|
FP64
0.03 TFLOPS
-
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-
-
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-
-
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-
-
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-
-
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Pixel Fillrate
10 GPixel/s
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Pixel Fillrate
2.876 GPixel/s
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-
-
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-
-
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Texture Fillrate
20 GTexel/s
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Texture Fillrate
11.504 GTexel/s
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-
-
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-
-
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L1
48KB/SM Tex
16KB/SM
-
-
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L1
-
64KB/SM
-
-
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L2
256KB Shared
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L2
256KB Shared
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-
-
-
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-
-
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1GB
GDDR5
-
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2GB
DDR3
-
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Bus Width
128Bit
|
Bus Width
64Bit
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Clock
1000MHz
Transfer Rate
4GT/s
Bandwidth
64GB/s
|
Clock
1000MHz
Transfer Rate
2GT/s
Bandwidth
16GB/s
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-
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TDP
32W
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TDP
15W
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-
-
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-
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No Ports
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No Ports
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Max Resolution
4096x2304
|
Max Resolution
2560x1600
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Max Resolution Refresh Rate
60Hz
|
Max Resolution Refresh Rate
60Hz
|
|
Variable Refresh Rate
G-Sync
FreeSync
-
|
Variable Refresh Rate
-
-
-
|
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Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
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Multi Monitor Support
3
|
Multi Monitor Support
2
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-
-
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-
-
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Model
NVENC 1
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No Encoders
-
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Codec
-
-
-
-
-
-
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AVC (H.264)
-
-
-
-
-
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-
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-
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Model
NVDEC 1
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No Decoders
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Codec
MPEG-1
MPEG-2
MPEG-4
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VC-1
-
-
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AVC (H.264)
-
-
-
-
-
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-
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-
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Direct X
12
Direct 3D
11_0
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Direct X
12
Direct 3D
11_0
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OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
|
OpenGL
4.6
OpenCL
1.1
-
-
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Shader Model
6.5
CUDA
3.0
-
-
PureVideo HD
VP5
VDPAU
Feature Set D
|
Shader Model
5.1
CUDA
2.1
-
-
PureVideo HD
VP5
VDPAU
Feature Set D
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Not a Card
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Not a Card
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-
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PCIe Version
3.0
PCIe Lanes
16
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-
-
PCIe Version
2.0
PCIe Lanes
16
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