AMD Radeon R9 M390 Mac Edition vs AMD Radeon RX 550X Mobile
GPU · Specs Compare
Graphics Card
Release Date
May 2015
Apr 2018
Generation
Crystal System
Mobility Radeon
Type
Mobile
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x8
Clock Speeds
Memory Clock
1365 MHz
1500 MHz
Base Clock
—
1100 MHz
Boost Clock
—
1176 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
64bit
Bandwidth
174.7GB/s
48.00GB/s
Render Config
Compute Units
16
10
Shading Units
1024
640
TMUs
64
40
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
30.66 GPixel/s
18.82 GPixel/s
Texture Rate
61.31 GTexel/s
47.04 GTexel/s
FP32 (float)
1.962 TFLOPS
1.505 TFLOPS
FP64 (double)
122.6 GFLOPS
94.08 GFLOPS
FP16 (half)
—
1.505 TFLOPS
Graphics Processor
GPU Name
Pitcairn
Polaris 23
GPU Variant
Pitcairn PRO(215-0828062)
Polaris 23 MXT
Architecture
GCN 1.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
2.8 billion
2.2 billion
Die Size
212 mm²
103 mm²
Board Design
TDP
80W
50W
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.2
1.2
Shader Model
5.1
6.4
▲ Specs Compare
Data sourced from official specifications and benchmark tests.