AMD Radeon R9 M395X Mac Edition vs AMD Radeon R9 M390 Mac Edition
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 2GB VRAM Radeon R9 M390 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M395X Mac Edition 's Advantages
More VRAM (4GB vs 2GB)
1024 additional rendering cores
AMD Radeon R9 M390 Mac Edition 's Advantages
Lower TDP (80W vs 250W)
Score
Benchmark
FP32 (float)
Radeon R9 M395X Mac Edition
+89%
3.723 TFLOPS
Radeon R9 M390 Mac Edition
1.962 TFLOPS
Graphics Card
May 2015
Release Date
May 2015
Crystal System
Generation
Crystal System
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
1365 MHz
Memory Clock
1365 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
174.7GB/s
Bandwidth
174.7GB/s
Render Config
32
Compute Units
16
-
-
-
2048
Shading Units
1024
128
TMUs
64
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
29.09 GPixel/s
Pixel Rate
30.66 GPixel/s
116.4 GTexel/s
Texture Rate
61.31 GTexel/s
3.723 TFLOPS
FP16 (half)
-
3.723 TFLOPS
FP32 (float)
1.962 TFLOPS
232.7 GFLOPS
FP64 (double)
122.6 GFLOPS
Board Design
250W
TDP
80W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Processor
Amethyst
GPU Name
Pitcairn
Amethyst XT
GPU Variant
Pitcairn PRO
(215-0828062)
GCN 3.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
2.8 billion
366 mm²
Die Size
212 mm²
Graphics Features
12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.0
OpenCL
1.2
1.2
Vulkan
1.2
-
-
-
6.3
Shader Model
5.1
