NVIDIA GeForce GTX 645 vs NVIDIA GeForce GTX 555

NVIDIA GeForce GTX 645
NVIDIA GeForce GTX 555
576 Shaders
1GB GDDR5
889MHz
288 Shaders
1GB GDDR5
736MHz
Peak AI Performance
1.02 TOPS
INT32
Peak AI Performance
0.85 TOPS
INT32
FP32
1.02 TFLOPS
FP32
850 GFLOPS
Form Factor
PCIe Card
1.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
64W
TDP
150W
-
-
Power Connectors
2x 6-Pin

Peak AI Performance

  • 20% faster vs GeForce GTX 555
  • 17% slower vs GeForce GTX 645
GeForce GTX 645 - 1.02 TOPS INT32
x1.2
GeForce GTX 555 - 0.85 TOPS INT32
x1

FP32

  • 20% faster vs GeForce GTX 555
  • 17% slower vs GeForce GTX 645
GeForce GTX 645 - 1.02 TFLOPS FP32
x1.2
GeForce GTX 555 - 850 GFLOPS FP32
x1
  • 4% faster vs GeForce GTX 555
  • 4% slower vs GeForce GTX 645
GeForce GTX 645 - 64GB/s
x1.04
GeForce GTX 555 - 61.3GB/s
x1
  • 57% lower vs GeForce GTX 555
  • 134% higher vs GeForce GTX 645
GeForce GTX 645 - 64W
x1
GeForce GTX 555 - 150W
x2.34
GB6 OpenCL N/A
0%
GB6 Metal N/A
0%
Manufacturer
NVIDIA
Manufacturer
NVIDIA
Chip Designer
NVIDIA
Chip Designer
NVIDIA
Architecture
Kepler
Architecture
Fermi
Family
GeForce 600
Family
GeForce 500
Codename
NVE6
GK106
Codename
NVCE
GF114
Market Segment
Desktop
Market Segment
Desktop
Release Date
4/22/2013
Release Date
5/14/2011
Foundry
TSMC
Foundry
TSMC
Fabrication Node
28nm
Fabrication Node
40nm
Die Size
221 mm²
Die Size
332 mm²
Transistor Count
2.5 Billion
Transistor Count
2 Billion
Transistor Density
11.49M/mm²
Transistor Density
5.87M/mm²
Form
PCIe Card
Form
PCIe Card
Shading Units
576 Shaders
Shading Units
288 Shaders
Texture Mapping Units
48 TMUs
Texture Mapping Units
48 TMUs
Render Output Units
16 ROPs
Render Output Units
24 ROPs
Streaming Multiprocessors
3 SMs
Streaming Multiprocessors
6 SMs
-
824MHz Base
889MHz
1472MHz Shader
-
736MHz
Peak AI Performance
1.02 TOPS
INT32
Peak AI Performance
0.85 TOPS
INT32
FP32
1.02 TFLOPS
FP32
850 GFLOPS
FP64
40 GFLOPS
FP64
70 GFLOPS
INT32
1.02 TOPS
INT32
0.85 TOPS
Pixel Fillrate
14.216 GPixel/s
Pixel Fillrate
17.664 GPixel/s
Texture Fillrate
42.648 GTexel/s
Texture Fillrate
35.328 GTexel/s
L1
48KB/SM Tex
16KB/SM
L1
-
64KB/SM
L2
512KB Shared
L2
512KB Shared
1GB
GDDR5
1GB
GDDR5
Bus Width
128Bit
Bus Width
128Bit
Clock
1000MHz
Transfer Rate
4GT/s
Bandwidth
64GB/s
Clock
957MHz
Transfer Rate
3.8GT/s
Bandwidth
61.3GB/s
TDP
64W
TDP
150W
1x DVI-I Dual-Link
1x DisplayPort 1.2
-
1x HDMI 1.4
2x DVI-I Dual-Link
-
1x mini-HDMI 1.3
-
Max Resolution
4096x2304
Max Resolution
2560x1600
Max Resolution Refresh Rate
30Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
G-Sync
FreeSync
Variable Refresh Rate
-
-
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
No Decoders
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
1.1
-
-
Shader Model
6.5
CUDA
3.0
PureVideo HD
VP5
VDPAU
Feature Set D
Shader Model
5.1
CUDA
2.1
PureVideo HD
VP4
VDPAU
Feature Set C
1x Fan
1x Fan
-
-
Power Connectors
2x 6-Pin
Slots Required
1.0
PCIe Version
3.0
PCIe Lanes
16
Slots Required
2.0
PCIe Version
2.0
PCIe Lanes
16
-
-
-
-
Multi GPU Support
Supported
Type
2-way SLI
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
210 mm (8.27 in)
Depth
38 mm (1.5 in)
Change Comparison