AMD Radeon R9 M290X Mac Edition vs AMD Radeon R9 M390X
GPU · Specs Compare
Graphics Card
Release Date
Nov 2014
May 2015
Generation
Crystal System
Crystal System
Type
Mobile
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
850 MHz
—
Boost Clock
975 MHz
—
Memory Clock
1365 MHz
1250 MHz
Memory
Memory Size
2GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
174.7GB/s
160.0GB/s
Render Config
Compute Units
16
32
Shading Units
1024
2048
TMUs
64
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
31.20 GPixel/s
23.14 GPixel/s
Texture Rate
62.40 GTexel/s
92.54 GTexel/s
FP32 (float)
1.997 TFLOPS
2.961 TFLOPS
FP64 (double)
124.8 GFLOPS
185.1 GFLOPS
FP16 (half)
—
2.961 TFLOPS
Graphics Processor
GPU Name
Pitcairn
Amethyst
GPU Variant
Pitcairn PRO(215-0828062)
Amethyst XT
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
5 billion
Die Size
212 mm²
366 mm²
Board Design
TDP
80W
75W
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
2.0
Vulkan
1.2
1.2
Shader Model
5.1
6.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.