NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 745
NVIDIA GeForce GT 640
$100
NVIDIA GeForce GTX 745
|
384 Shaders
2GB DDR3
900MHz
|
384 Shaders
1GB DDR3
1033MHz
|
|
Peak AI Performance
0.69 TOPS
INT32
|
Peak AI Performance
3.17 TOPS
INT8
|
|
FP32
690 GFLOPS
|
FP32
790 GFLOPS
|
|
Form Factor
PCIe Card
1.5-Slots
|
Form Factor
PCIe Card
1.0-Slots
|
|
TDP
65W
|
TDP
55W
|
Peak AI Performance
|
|
GeForce GT 640 - 0.69 TOPS INT32
x1
GeForce GTX 745 - 3.17 TOPS INT8
x4.59
FP32
|
|
GeForce GT 640 - 690 GFLOPS FP32
x1
GeForce GTX 745 - 790 GFLOPS FP32
x1.14
|
|
GeForce GT 640 - 28.5GB/s
x1
GeForce GTX 745 - 28.8GB/s
x1.01
|
|
GeForce GT 640 - 65W
x1.18
GeForce GTX 745 - 55W
x1
|
|
GeForce GT 640 - GB6 OpenCL 3,680
x1
GeForce GTX 745 - GB6 OpenCL 6,305
x1.71
|
GB6 Metal 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
Maxwell
|
|
Family
GeForce 600
|
Family
GeForce 700
|
|
Codename
NVE7
GK107
-
-
|
Codename
NV117
GM107
Variant
GM107-220-A2
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
6/5/2012
|
Release Date
2/18/2014
|
|
Foundry
TSMC
|
Foundry
TSMC
|
|
Fabrication Node
28nm
|
Fabrication Node
28nm
|
|
Die Size
118 mm²
|
Die Size
148 mm²
|
|
Transistor Count
1.3 Billion
|
Transistor Count
1.9 Billion
|
|
Transistor Density
10.76M/mm²
|
Transistor Density
12.64M/mm²
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
384 Shaders
|
Shading Units
384 Shaders
|
|
Texture Mapping Units
32 TMUs
|
Texture Mapping Units
24 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
16 ROPs
|
|
Streaming Multiprocessors
2 SMs
|
Streaming Multiprocessors
3 SMs
|
|
900MHz
|
1033MHz
|
|
Peak AI Performance
0.69 TOPS
INT32
|
Peak AI Performance
3.17 TOPS
INT8
|
|
FP32
690 GFLOPS
|
FP32
790 GFLOPS
|
|
FP64
30 GFLOPS
|
FP64
30 GFLOPS
|
|
-
-
|
INT8
3.17 TOPS
|
|
INT32
0.69 TOPS
|
INT32
0.79 TOPS
|
|
Pixel Fillrate
14.4 GPixel/s
|
Pixel Fillrate
16.528 GPixel/s
|
|
Texture Fillrate
28.8 GTexel/s
|
Texture Fillrate
24.792 GTexel/s
|
|
L1
48KB/SM Tex
16KB/SM
|
L1
-
64KB/SM
|
|
L2
256KB Shared
|
L2
2MB Shared
|
|
2GB
DDR3
|
1GB
DDR3
|
|
Bus Width
128Bit
|
Bus Width
128Bit
|
|
Clock
891MHz
Transfer Rate
1.8GT/s
Bandwidth
28.5GB/s
|
Clock
900MHz
Transfer Rate
1.8GT/s
Bandwidth
28.8GB/s
|
|
TDP
65W
|
TDP
55W
|
|
1x VGA
1x DVI-I Dual-Link
-
1x HDMI 1.4
|
1x VGA
-
1x DVI-D 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
|
Model
NVENC 2
|
|
Codec
AVC (H.264)
|
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
1.3
|
|
Shader Model
6.5
CUDA
3.0
PureVideo HD
VP5
VDPAU
Feature Set D
|
Shader Model
6.7
CUDA
5.0
PureVideo HD
VP6
VDPAU
Feature Set E
|
|
1x Fan
|
1x Fan
|
|
Slots Required
1.5
PCIe Version
3.0
PCIe Lanes
16
|
Slots Required
1.0
PCIe Version
3.0
PCIe Lanes
16
|
|
Height
111 mm (4.37 in)
Width
145 mm (5.71 in)
Depth
30 mm (1.18 in)
|
Height
69 mm (2.72 in)
Width
155 mm (6.1 in)
Depth
20 mm (0.79 in)
|
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