NVIDIA GeForce GT 640M Mac vs NVIDIA GeForce GTX 660M Mac
NVIDIA GeForce GT 640M Mac
NVIDIA GeForce GTX 660M Mac
|
384 Shaders
512MB GDDR5
625MHz
|
384 Shaders
512MB GDDR5
950MHz
|
|
Peak AI Performance
0.48 TOPS
INT32
|
Peak AI Performance
0.73 TOPS
INT32
|
|
FP32
480 GFLOPS
|
FP32
730 GFLOPS
|
|
Form Factor
Soldered
|
Form Factor
Soldered
|
|
TDP
32W
|
TDP
50W
|
Peak AI Performance
|
|
GeForce GT 640M Mac - 0.48 TOPS INT32
x1
GeForce GTX 660M Mac - 0.73 TOPS INT32
x1.52
FP32
|
|
GeForce GT 640M Mac - 480 GFLOPS FP32
x1
GeForce GTX 660M Mac - 730 GFLOPS FP32
x1.52
|
|
GeForce GT 640M Mac - 64GB/s
x1
GeForce GTX 660M Mac - 80GB/s
x1.25
|
|
GeForce GT 640M Mac - 32W
x1
GeForce GTX 660M Mac - 50W
x1.56
|
Manufacturer
NVIDIA
|
Manufacturer
NVIDIA
|
|
Chip Designer
NVIDIA
|
Chip Designer
NVIDIA
|
|
Architecture
Kepler
|
Architecture
Kepler
|
|
Family
GeForce 600
|
Family
GeForce 600
|
|
Codename
NVE7
GK107
Variant
N13P-GS
|
Codename
NVE7
GK107
Variant
N13E-GE
|
|
Market Segment
Laptop
|
Market Segment
Laptop
|
|
Release Date
3/22/2012
|
Release Date
3/22/2012
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|
Foundry
TSMC
|
Foundry
TSMC
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|
Fabrication Node
28nm
|
Fabrication Node
28nm
|
|
Die Size
118 mm²
|
Die Size
118 mm²
|
|
Transistor Count
1.3 Billion
|
Transistor Count
1.3 Billion
|
|
Transistor Density
10.76M/mm²
|
Transistor Density
10.76M/mm²
|
|
Form
Soldered
|
Form
Soldered
|
|
Shading Units
384 Shaders
|
Shading Units
384 Shaders
|
|
Texture Mapping Units
32 TMUs
|
Texture Mapping Units
32 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
16 ROPs
|
|
Streaming Multiprocessors
2 SMs
|
Streaming Multiprocessors
2 SMs
|
|
625MHz
|
950MHz
|
|
Peak AI Performance
0.48 TOPS
INT32
|
Peak AI Performance
0.73 TOPS
INT32
|
|
FP32
480 GFLOPS
|
FP32
730 GFLOPS
|
|
FP64
20 GFLOPS
|
FP64
30 GFLOPS
|
|
INT32
0.48 TOPS
|
INT32
0.73 TOPS
|
|
Pixel Fillrate
10 GPixel/s
|
Pixel Fillrate
15.2 GPixel/s
|
|
Texture Fillrate
20 GTexel/s
|
Texture Fillrate
30.4 GTexel/s
|
|
L1
48KB/SM Tex
16KB/SM
|
L1
48KB/SM Tex
16KB/SM
|
|
L2
256KB Shared
|
L2
256KB Shared
|
|
512MB
GDDR5
|
512MB
GDDR5
|
|
Bus Width
128Bit
|
Bus Width
128Bit
|
|
Clock
1000MHz
Transfer Rate
4GT/s
Bandwidth
64GB/s
|
Clock
1250MHz
Transfer Rate
5GT/s
Bandwidth
80GB/s
|
|
TDP
32W
|
TDP
50W
|
|
Max Resolution
4096x2304
|
Max Resolution
4096x2304
|
|
Max Resolution Refresh Rate
60Hz
|
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
3
|
Multi Monitor Support
2
|
|
Model
NVENC 1
|
Model
NVENC 1
|
|
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
1.2
|
|
Shader Model
6.5
CUDA
3.0
PureVideo HD
VP5
VDPAU
Feature Set D
|
Shader Model
6.5
CUDA
3.0
PureVideo HD
VP5
VDPAU
Feature Set D
|
|
Not a Card
|
Not a Card
|
|
PCIe Version
3.0
PCIe Lanes
16
|
PCIe Version
3.0
PCIe Lanes
16
|
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