Radeon R9 M395X Mac Edition vs GeForce GTX 660M Mac Edition
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 512MB VRAM GeForce GTX 660M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 M395X Mac Edition 's Advantages
Released 2 years and 1 months late
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (174.7GB/s vs 80.00GB/s)
1664 additional rendering cores
GeForce GTX 660M Mac Edition 's Advantages
Lower TDP (50W vs 250W)
Score
Benchmark
FP32 (float)
Radeon R9 M395X Mac Edition
+410%
3723
GeForce GTX 660M Mac Edition
730
Graphics Card
May 2015
Release Date
Apr 2013
Crystal System
Generation
GeForce 600M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
MXM-B (3.0)
Clock Speeds
1365 MHz
Memory Clock
1250 MHz
Memory
4GB
Memory Size
512MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
174.7GB/s
Bandwidth
80.00GB/s
Render Config
32
Compute Units
-
2048
Shading Units
384
128
TMUs
32
32
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
256 KB
Theoretical Performance
29.09 GPixel/s
Pixel Rate
7.600 GPixel/s
116.4 GTexel/s
Texture Rate
30.40 GTexel/s
3.723 TFLOPS
FP16 (half)
-
3.723 TFLOPS
FP32 (float)
729.6 GFLOPS
232.7 GFLOPS
FP64 (double)
30.40 GFLOPS
Board Design
250W
TDP
50W
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Processor
Amethyst
GPU Name
GK107
Amethyst XT
GPU Variant
-
GCN 3.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
1.27 billion
366 mm²
Die Size
118 mm²
Graphics Features
12 (12_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.0
OpenCL
3.0
1.2
Vulkan
1.1
-
CUDA
3.0
6.3
Shader Model
5.1