GeForce 940M vs GeForce GTX 660M
We compared two Mobile platform GPUs: 2GB VRAM GeForce 940M and 1024MB VRAM GeForce GTX 660M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce 940M Advantages
Released 3 years late
Boost Clock has increased by 16% (1098MHz vs 950MHz)
More VRAM (2GB vs 1024GB)
128 additional rendering cores
GeForce GTX 660M Advantages
Larger VRAM bandwidth (64.00GB/s vs 14.40GB/s)
Lower TDP (50W vs 75W)
Score
Benchmark
FP32 (float)
GeForce 940M
+53%
1124
GeForce GTX 660M
730
Graphics Card
Mar 2015
Release Date
Mar 2012
GeForce 900M
Generation
GeForce 600M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
MXM-B (3.0)
Clock Speeds
1020 MHz
Base Clock
835 MHz
1098 MHz
Boost Clock
950 MHz
900 MHz
Memory Clock
1000 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
64bit
Memory Bus
128bit
14.40GB/s
Bandwidth
64.00GB/s
Render Config
512
Shading Units
384
32
TMUs
32
16
ROPs
16
64 KB (per SMM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
256 KB
Theoretical Performance
17.57 GPixel/s
Pixel Rate
7.600 GPixel/s
35.14 GTexel/s
Texture Rate
30.40 GTexel/s
1124 GFLOPS
FP32 (float)
729.6 GFLOPS
35.14 GFLOPS
FP64 (double)
30.40 GFLOPS
Board Design
75W
TDP
50W
No outputs
Outputs
No outputs
Graphics Processor
GM107
GPU Name
GK107
N16S-GT1-KB-B
GPU Variant
N13E-GE-A2
Maxwell
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.87 billion
Transistors
1.27 billion
148 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.0
CUDA
3.0
5.1
Shader Model
5.1
