NVIDIA GeForce GTX 660M Mac Edition vs NVIDIA GeForce GTX 850A
We compared two Mobile platform GPUs: 512MB VRAM GeForce GTX 660M Mac Edition and 2GB VRAM GeForce GTX 850A 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
Larger VRAM bandwidth (80.00GB/s vs 28.80GB/s)
NVIDIA GeForce GTX 850A 's Advantages
Released 11 months late
Boost Clock936MHz
More VRAM (2GB vs 512GB)
256 additional rendering cores
Lower TDP (45W vs 50W)
Score
Benchmark
FP32 (float)
GeForce GTX 660M Mac Edition
0.73 TFLOPS
GeForce GTX 850A
+64%
1.198 TFLOPS
Graphics Card
Apr 2013
Release Date
Mar 2014
GeForce 600M
Generation
GeForce 800A
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
902 MHz
-
Boost Clock
936 MHz
1250 MHz
Memory Clock
900 MHz
Memory
512MB
Memory Size
2GB
GDDR5
Memory Type
DDR3
128bit
Memory Bus
128bit
80.00GB/s
Bandwidth
28.80GB/s
Render Config
-
-
-
-
-
-
384
Shading Units
640
32
TMUs
40
16
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SMM)
256 KB
L2 Cache
2 MB
-
-
-
Theoretical Performance
7.600 GPixel/s
Pixel Rate
14.98 GPixel/s
30.40 GTexel/s
Texture Rate
37.44 GTexel/s
-
-
-
729.6 GFLOPS
FP32 (float)
1198 GFLOPS
30.40 GFLOPS
FP64 (double)
37.44 GFLOPS
Board Design
50W
TDP
45W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-
Graphics Processor
GK107
GPU Name
GM107
-
GPU Variant
N15P-GT-A1
Kepler
Architecture
Maxwell
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
1.87 billion
118 mm²
Die Size
148 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.3
3.0
CUDA
5.0
5.1
Shader Model
5.1
