NVIDIA GeForce GTX 645 vs NVIDIA GeForce GT 640 GK208
NVIDIA GeForce GTX 645
NVIDIA GeForce GT 640 GK208
|
576 Shaders
1GB GDDR5
889MHz
|
384 Shaders
1GB GDDR5
1046MHz
|
|
Peak AI Performance
1.02 TOPS
INT32
|
Peak AI Performance
0.8 TOPS
INT32
|
|
FP32
1.02 TFLOPS
|
FP32
800 GFLOPS
|
|
-
-
|
-
-
|
|
Form Factor
PCIe Card
1.0-Slots
|
Form Factor
PCIe Card
1.5-Slots
|
|
TDP
64W
|
TDP
49W
|
|
-
-
-
-
-
|
-
-
-
-
-
|
|
GB6 OpenCL N/A
0%
|
|
|
GB6 Metal N/A
0%
|
|
|
GB6 Vulkan N/A
0%
|
GB6 Vulkan N/A
0%
|
|
GB5 OpenCL N/A
0%
|
GB5 OpenCL N/A
0%
|
|
GB5 CUDA N/A
0%
|
GB5 CUDA N/A
0%
|
|
GB5 Metal N/A
0%
|
GB5 Metal N/A
0%
|
|
GB5 Vulkan N/A
0%
|
GB5 Vulkan N/A
0%
|
|
OCT 2020.1 N/A
0%
|
OCT 2020.1 N/A
0%
|
|
OCT Metal N/A
0%
|
OCT Metal N/A
0%
|
|
Peak AI
Performance
1.02 TOPS
INT32
|
Peak AI
Performance
0.8 TOPS
INT32
|
|
-
-
-
|
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
FP32
1.02 TFLOPS
-
-
|
FP32
800 GFLOPS
-
-
|
|
FP64
40 GFLOPS
-
|
FP64
30 GFLOPS
-
|
|
-
-
-
-
|
-
-
-
-
|
|
-
-
-
|
-
-
-
|
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-
-
-
|
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
INT32
1.02 TOPS
|
INT32
0.8 TOPS
|
|
-
-
|
-
-
|
|
Pixel
Fillrate
14.216 GPixel/s
|
Pixel
Fillrate
8.368 GPixel/s
|
|
-
-
|
-
-
|
|
Texture
Fillrate
42.648 GTexel/s
|
Texture
Fillrate
16.736 GTexel/s
|
|
Manufacturer
NVIDIA
|
Manufacturer
NVIDIA
|
|
Chip Designer
NVIDIA
|
Chip Designer
NVIDIA
|
|
Architecture
Kepler
|
Architecture
Kepler 2
|
|
Family
GeForce 600
|
Family
GeForce 600
|
|
Codename
NVE6
GK106
-
-
|
Codename
NV108
GK208
Variant
GK208-400-A1
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
4/22/2013
|
Release Date
5/29/2013
|
|
Foundry
TSMC
-
|
Foundry
TSMC
-
|
|
Fabrication Node
28nm
-
|
Fabrication Node
28nm
-
|
|
Die Size
221 mm²
-
|
Die Size
79 mm²
-
|
|
Transistor Count
2.5 Billion
-
|
Transistor Count
1 Billion
-
|
|
Transistor Density
11.49M/mm²
-
|
Transistor Density
12.91M/mm²
-
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
576 Shaders
-
|
Shading Units
384 Shaders
-
|
|
Texture Mapping Units
48 TMUs
|
Texture Mapping Units
16 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
8 ROPs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
Streaming Multiprocessors
3 SMs
|
Streaming Multiprocessors
2 SMs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
824MHz Base
889MHz
|
-
-
-
1046MHz
|
|
-
-
|
-
-
|
|
L1
48KB/SM Tex
16KB/SM
-
-
|
L1
48KB/SM Tex
16KB/SM
-
-
|
|
L2
512KB Shared
|
L2
256KB Shared
|
|
-
-
-
|
-
-
-
|
|
1GB
GDDR5
-
|
1GB
GDDR5
-
|
|
Bus Width
128Bit
|
Bus Width
64Bit
|
|
Clock
1000MHz
Transfer Rate
4GT/s
Bandwidth
64GB/s
|
Clock
1252MHz
Transfer Rate
5GT/s
Bandwidth
40.1GB/s
|
|
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
|
|
TDP
64W
|
TDP
49W
|
|
-
-
|
-
-
|
|
-
-
-
-
-
-
-
-
1x DVI-I Dual-Link
-
-
-
-
-
-
-
-
-
-
-
-
-
1x DisplayPort 1.2
-
-
-
-
-
-
-
-
-
-
-
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
1.0
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
168 mm (6.61 in)
Depth
20 mm (0.79 in)
|
Height
111 mm (4.37 in)
Width
145 mm (5.71 in)
Depth
30 mm (1.18 in)
|
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