AMD Radeon R9 M390X vs AMD Radeon R9 M390 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
May 2015
May 2015
Generation
Crystal System
Crystal System
Type
Mobile
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1250 MHz
1365 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
174.7GB/s
Render Config
Compute Units
32
16
Shading Units
2048
1024
TMUs
128
64
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
23.14 GPixel/s
30.66 GPixel/s
Texture Rate
92.54 GTexel/s
61.31 GTexel/s
FP16 (half)
2.961 TFLOPS
-
FP32 (float)
2.961 TFLOPS
1.962 TFLOPS
FP64 (double)
185.1 GFLOPS
122.6 GFLOPS
Graphics Processor
GPU Name
Amethyst
Pitcairn
GPU Variant
Amethyst XT
Pitcairn PRO(215-0828062)
Architecture
GCN 3.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
5 billion
2.8 billion
Die Size
366 mm²
212 mm²
Board Design
TDP
75W
80W
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
1.2
Vulkan
1.2
1.2
Shader Model
6.3
5.1