AMD Radeon R9 M395X Mac Edition vs AMD Radeon RX 640 Mobile
GPU Specs Compare
Graphics Card
Release Date
May 2015
May 2019
Generation
Crystal System
Mobility Radeon
Type
Mobile
Mobile
Bus Interface
MXM-B (3.0)
PCIe 3.0 x8
Clock Speeds
Memory Clock
1365 MHz
1500 MHz
Base Clock
-
1082 MHz
Boost Clock
-
1218 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
64bit
Bandwidth
174.7GB/s
48.00GB/s
Render Config
Compute Units
32
10
Shading Units
2048
640
TMUs
128
40
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
29.09 GPixel/s
19.49 GPixel/s
Texture Rate
116.4 GTexel/s
48.72 GTexel/s
FP16 (half)
3.723 TFLOPS
1.559 TFLOPS
FP32 (float)
3.723 TFLOPS
1.559 TFLOPS
FP64 (double)
232.7 GFLOPS
97.44 GFLOPS
Graphics Processor
GPU Name
Amethyst
Polaris 23
GPU Variant
Amethyst XT
Polaris 23 XT
Architecture
GCN 3.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
5 billion
2.2 billion
Die Size
366 mm²
103 mm²
Board Design
TDP
250W
50W
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.0
2.1
Vulkan
1.2
1.2
Shader Model
6.3
6.4