AMD Radeon RX 580X Mobile vs AMD Radeon RX 550X Mobile
GPU Specs Compare
Graphics Card
Release Date
Apr 2018
Apr 2018
Generation
Mobility Radeon
Mobility Radeon
Type
Mobile
Mobile
Bus Interface
MXM-B (3.0)
PCIe 3.0 x8
Clock Speeds
Base Clock
1000 MHz
1100 MHz
Boost Clock
1077 MHz
1176 MHz
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
64bit
Bandwidth
256.0GB/s
48.00GB/s
Render Config
Compute Units
36
10
Shading Units
2304
640
TMUs
144
40
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
2 MB
512 KB
Theoretical Performance
Pixel Rate
34.46 GPixel/s
18.82 GPixel/s
Texture Rate
155.1 GTexel/s
47.04 GTexel/s
FP16 (half)
4.963 TFLOPS
1.505 TFLOPS
FP32 (float)
4.963 TFLOPS
1.505 TFLOPS
FP64 (double)
310.2 GFLOPS
94.08 GFLOPS
Graphics Processor
GPU Name
Polaris 20
Polaris 23
GPU Variant
Polaris 20M XT
Polaris 23 MXT
Architecture
GCN 4.0
GCN 4.0
Foundry
GlobalFoundries
GlobalFoundries
Process Size
14 nm
14 nm
Transistors
5.7 billion
2.2 billion
Die Size
232 mm²
103 mm²
Board Design
TDP
100W
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
2.1
2.1
Vulkan
1.2
1.2
Shader Model
6.4
6.4