GeForce GT 635 vs GeForce GT 645

GeForce GT 635
GeForce GT 645
384 Shaders
1GB DDR3
967MHz
288 Shaders
1GB GDDR5
776MHz
FP32
0.74 TFLOPS
FP32
0.89 TFLOPS
-
-
-
-
Form Factor
PCIe Card
1.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
35W
TDP
140W
-
-
-
-
-
-
-
-
-
-
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%
Manufacturer
NVIDIA
Manufacturer
NVIDIA
Chip Designer
NVIDIA
Chip Designer
NVIDIA
Architecture
Kepler 2
Architecture
Fermi
Family
GeForce 600
Family
GeForce 600
Codename
NV108
GK208
-
-
Codename
NVCE
GF114
Variant
GF114-400-A1
Market Segment
Desktop
Market Segment
Desktop
Release Date
2/19/2013
Release Date
4/24/2012
Foundry
TSMC
-
Foundry
TSMC
-
Fabrication Node
28nm
-
Fabrication Node
40nm
-
Die Size
79 mm²
-
Die Size
332 mm²
-
Transistor Count
1 Billion
-
Transistor Count
2 Billion
-
Transistor Density
12.91M/mm²
-
Transistor Density
5.87M/mm²
-
Form
PCIe Card
Form
PCIe Card
Shading Units
384 Shaders
-
Shading Units
288 Shaders
-
Texture Mapping Units
16 TMUs
Texture Mapping Units
48 TMUs
Render Output Units
8 ROPs
Render Output Units
24 ROPs
-
-
-
-
-
-
-
-
Streaming Multiprocessors
2 SMs
Streaming Multiprocessors
6 SMs
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
967MHz
-
1552MHz Shader
-
776MHz
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FP32
0.74 TFLOPS
FP32
0.89 TFLOPS
-
-
-
-
FP64
0.03 TFLOPS
-
FP64
0.07 TFLOPS
-
-
-
-
-
-
-
-
-
-
-
Pixel Fillrate
7.736 GPixel/s
Pixel Fillrate
18.624 GPixel/s
-
-
-
-
Texture Fillrate
15.472 GTexel/s
Texture Fillrate
37.248 GTexel/s
-
-
-
-
L1
48KB/SM Tex
16KB/SM
-
-
L1
-
64KB/SM
-
-
L2
256KB Shared
L2
512KB Shared
-
-
-
-
-
-
1GB
DDR3
-
1GB
GDDR5
-
Bus Width
64Bit
Bus Width
192Bit
Clock
1000MHz
Transfer Rate
2GT/s
Bandwidth
16GB/s
Clock
957MHz
Transfer Rate
3.8GT/s
Bandwidth
91.9GB/s
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TDP
35W
TDP
140W
-
-
-
-
1x VGA
-
-
-
-
-
-
-
1x DVI-I Dual-Link
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
-
-
-
-
No Encoders
-
No Encoders
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
3.5
-
-
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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Slots Required
1.0
PCIe Version
3.0
PCIe Lanes
8
Slots Required
2.0
PCIe Version
2.0
PCIe Lanes
16
-
-
-
-
-
-
-
-
Height
69 mm (2.72 in)
Width
155 mm (6.1 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 Results