NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 640 GK208
NVIDIA GeForce GT 640
$100
NVIDIA GeForce GT 640 GK208
|
384 Shaders
2GB DDR3
900MHz
|
384 Shaders
1GB GDDR5
1046MHz
|
|
Peak AI Performance
0.69 TOPS
INT32
|
Peak AI Performance
0.8 TOPS
INT32
|
|
FP32
690 GFLOPS
|
FP32
800 GFLOPS
|
|
Form Factor
PCIe Card
1.5-Slots
|
Form Factor
PCIe Card
1.5-Slots
|
|
TDP
65W
|
TDP
49W
|
Peak AI Performance
|
|
GeForce GT 640 - 0.69 TOPS INT32
x1
GeForce GT 640 GK208 - 0.8 TOPS INT32
x1.16
FP32
|
|
GeForce GT 640 - 690 GFLOPS FP32
x1
GeForce GT 640 GK208 - 800 GFLOPS FP32
x1.16
|
|
GeForce GT 640 - 28.5GB/s
x1
GeForce GT 640 GK208 - 40.1GB/s
x1.41
|
|
GeForce GT 640 - 65W
x1.33
GeForce GT 640 GK208 - 49W
x1
|
GB6 OpenCL N/A
0%
|
|
|
GB6 Metal N/A
0%
|
|
|
GB6 Vulkan N/A
0%
|
|
0%
|
0%
|
|
0%
|
0%
|
|
0%
|
0%
|
|
0%
|
0%
|
|
0%
|
0%
|
|
0%
|
0%
|
|
Manufacturer
NVIDIA
|
Manufacturer
NVIDIA
|
|
Chip Designer
NVIDIA
|
Chip Designer
NVIDIA
|
|
Architecture
Kepler
|
Architecture
Kepler 2
|
|
Family
GeForce 600
|
Family
GeForce 600
|
|
Codename
NVE7
GK107
-
-
|
Codename
NV108
GK208
Variant
GK208-400-A1
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
6/5/2012
|
Release Date
5/29/2013
|
|
Foundry
TSMC
|
Foundry
TSMC
|
|
Fabrication Node
28nm
|
Fabrication Node
28nm
|
|
Die Size
118 mm²
|
Die Size
79 mm²
|
|
Transistor Count
1.3 Billion
|
Transistor Count
1 Billion
|
|
Transistor Density
10.76M/mm²
|
Transistor Density
12.91M/mm²
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
384 Shaders
|
Shading Units
384 Shaders
|
|
Texture Mapping Units
32 TMUs
|
Texture Mapping Units
16 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
8 ROPs
|
|
Streaming Multiprocessors
2 SMs
|
Streaming Multiprocessors
2 SMs
|
|
900MHz
|
1046MHz
|
|
Peak AI Performance
0.69 TOPS
INT32
|
Peak AI Performance
0.8 TOPS
INT32
|
|
FP32
690 GFLOPS
|
FP32
800 GFLOPS
|
|
FP64
30 GFLOPS
|
FP64
30 GFLOPS
|
|
INT32
0.69 TOPS
|
INT32
0.8 TOPS
|
|
Pixel Fillrate
14.4 GPixel/s
|
Pixel Fillrate
8.368 GPixel/s
|
|
Texture Fillrate
28.8 GTexel/s
|
Texture Fillrate
16.736 GTexel/s
|
|
L1
48KB/SM Tex
16KB/SM
|
L1
48KB/SM Tex
16KB/SM
|
|
L2
256KB Shared
|
L2
256KB Shared
|
|
2GB
DDR3
|
1GB
GDDR5
|
|
Bus Width
128Bit
|
Bus Width
64Bit
|
|
Clock
891MHz
Transfer Rate
1.8GT/s
Bandwidth
28.5GB/s
|
Clock
1252MHz
Transfer Rate
5GT/s
Bandwidth
40.1GB/s
|
|
TDP
65W
|
TDP
49W
|
|
1x VGA
1x DVI-I Dual-Link
1x HDMI 1.4
|
1x VGA
1x DVI-I Dual-Link
1x HDMI 1.4
|
|
Max Resolution
4096x2304
|
Max Resolution
4096x2304
|
|
Max Resolution Refresh Rate
30Hz
|
Max Resolution Refresh Rate
30Hz
|
|
Variable Refresh Rate
G-Sync
FreeSync
|
Variable Refresh Rate
G-Sync
FreeSync
|
|
Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
|
|
Multi Monitor Support
2
|
Multi Monitor Support
2
|
|
Model
NVENC 1
|
No Encoders
-
|
|
Codec
AVC (H.264)
|
-
-
|
|
Model
NVDEC 1
|
Model
NVDEC 1
|
|
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
|
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
|
|
Direct X
12
Direct 3D
11_0
|
Direct X
12
Direct 3D
11_0
|
|
OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
|
OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
|
|
Shader Model
6.5
CUDA
3.0
PureVideo HD
VP5
VDPAU
Feature Set D
|
Shader Model
6.5
CUDA
3.5
PureVideo HD
VP5
VDPAU
Feature Set D
|
|
1x Fan
|
1x Fan
|
|
Slots Required
1.5
PCIe Version
3.0
PCIe Lanes
16
|
Slots Required
1.5
PCIe Version
2.0
PCIe Lanes
8
|
|
Height
111 mm (4.37 in)
Width
145 mm (5.71 in)
Depth
30 mm (1.18 in)
|
Height
111 mm (4.37 in)
Width
145 mm (5.71 in)
Depth
30 mm (1.18 in)
|
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