NVIDIA GeForce GTX 660M Mac Edition vs NVIDIA GeForce GT 420M
We compared two Mobile platform GPUs: 512MB VRAM GeForce GTX 660M Mac Edition and 512MB VRAM GeForce GT 420M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 660M Mac Edition 's Advantages
Released 2 years and 7 months late
Larger VRAM bandwidth (80.00GB/s vs 25.60GB/s)
288 additional rendering cores
NVIDIA GeForce GT 420M 's Advantages
Lower TDP (23W vs 50W)
Score
Benchmark
FP32 (float)
GeForce GTX 660M Mac Edition
+280%
0.73 TFLOPS
GeForce GT 420M
0.192 TFLOPS
Graphics Card
Apr 2013
Release Date
Sep 2010
GeForce 600M
Generation
GeForce 400M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
1250 MHz
Memory Clock
800 MHz
Memory
512MB
Memory Size
512MB
GDDR5
Memory Type
DDR3
128bit
Memory Bus
128bit
80.00GB/s
Bandwidth
25.60GB/s
Render Config
-
-
-
-
SM Count
2
384
Shading Units
96
32
TMUs
16
16
ROPs
4
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
7.600 GPixel/s
Pixel Rate
2.000 GPixel/s
30.40 GTexel/s
Texture Rate
8.000 GTexel/s
-
-
-
729.6 GFLOPS
FP32 (float)
192.0 GFLOPS
30.40 GFLOPS
FP64 (double)
16.00 GFLOPS
Board Design
50W
TDP
23W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-
Graphics Processor
GK107
GPU Name
GF108
-
GPU Variant
N11P-GE-A1
Kepler
Architecture
Fermi
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.27 billion
Transistors
0.585 billion
118 mm²
Die Size
116 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
1.1
1.1
Vulkan
N/A
3.0
CUDA
2.1
5.1
Shader Model
5.1
