Radeon R9 M395X Mac Edition vs Radeon RX 640 Mobile
We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 2GB VRAM Radeon RX 640 Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 M395X Mac Edition 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (174.7GB/s vs 48.00GB/s)
1408 additional rendering cores
Radeon RX 640 Mobile 's Advantages
Released 4 years late
Boost Clock1218MHz
Lower TDP (50W vs 250W)
Score
Benchmark
FP32 (float)
Radeon R9 M395X Mac Edition
+138%
3723
Radeon RX 640 Mobile
1559
Graphics Card
May 2015
Release Date
May 2019
Crystal System
Generation
Mobility Radeon
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x8
Clock Speeds
-
Base Clock
1082 MHz
-
Boost Clock
1218 MHz
1365 MHz
Memory Clock
1500 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
174.7GB/s
Bandwidth
48.00GB/s
Render Config
32
Compute Units
10
2048
Shading Units
640
128
TMUs
40
32
ROPs
16
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
512 KB
Theoretical Performance
29.09 GPixel/s
Pixel Rate
19.49 GPixel/s
116.4 GTexel/s
Texture Rate
48.72 GTexel/s
3.723 TFLOPS
FP16 (half)
1.559 TFLOPS
3.723 TFLOPS
FP32 (float)
1.559 TFLOPS
232.7 GFLOPS
FP64 (double)
97.44 GFLOPS
Board Design
250W
TDP
50W
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Processor
Amethyst
GPU Name
Polaris 23
Amethyst XT
GPU Variant
Polaris 23 XT
GCN 3.0
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
28 nm
Process Size
14 nm
5 billion
Transistors
2.2 billion
366 mm²
Die Size
103 mm²
Graphics Features
12 (12_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.0
OpenCL
2.1
1.2
Vulkan
1.2
6.3
Shader Model
6.4
