AMD Radeon R9 M390 Mac Edition vs AMD Radeon RX 580
GPU · Specs Compare
Graphics Card
Release Date
May 2015
Apr 2017
Generation
Crystal System
Polaris
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1365 MHz
2000 MHz
Base Clock
—
1257 MHz
Boost Clock
—
1340 MHz
Memory
Memory Size
2GB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
174.7GB/s
256.0GB/s
Render Config
Compute Units
16
36
Shading Units
1024
2304
TMUs
64
144
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
2 MB
Theoretical Performance
Pixel Rate
30.66 GPixel/s
42.88 GPixel/s
Texture Rate
61.31 GTexel/s
193.0 GTexel/s
FP32 (float)
1.962 TFLOPS
6.175 TFLOPS
FP64 (double)
122.6 GFLOPS
385.9 GFLOPS
FP16 (half)
—
6.175 TFLOPS
Graphics Processor
GPU Name
Pitcairn
Polaris 20
GPU Variant
Pitcairn PRO(215-0828062)
Polaris 20 XTX(215-0910038)
Architecture
GCN 1.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
2.8 billion
5.7 billion
Die Size
212 mm²
232 mm²
Board Design
TDP
80W
185W
Outputs
No outputs
1x HDMI 2.0b3x DisplayPort 1.4a
Power Connectors
None
1x 8-pin
Suggested PSU
—
450 W
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.2
1.3
Shader Model
5.1
6.7
▲ Specs Compare
Data sourced from official specifications and benchmark tests.