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GPU Comparison
AMD Radeon R9 M390 Mac Edition vs AMD Radeon Pro 555X
AMD Radeon R9 M390 Mac Edition vs AMD Radeon Pro 555X
VS
AMD Radeon R9 M390 Mac Edition
AMD Radeon Pro 555X
We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 4GB VRAM Radeon Pro 555X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 M390 Mac Edition 's Advantages
Larger VRAM bandwidth (174.7GB/s vs 94.08GB/s)
256 additional rendering cores
AMD Radeon Pro 555X 's Advantages
Released 3 years and 2 months late
More VRAM (4GB vs 2GB)
Lower TDP (75W vs 80W)
Score
Benchmark
FP32 (float)
Radeon R9 M390 Mac Edition
+40%
1.962 TFLOPS
Radeon Pro 555X
1.393 TFLOPS
Radeon R9 M390 Mac Edition
VS
Radeon Pro 555X
Graphics Card
May 2015
Release Date
Jul 2018
Crystal System
Generation
Radeon Pro Mac
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x8
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1365 MHz
Memory Clock
1470 MHz
Memory
2GB
Memory Size
4GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
174.7GB/s
Bandwidth
94.08GB/s
Render Config
-
SM Count
-
16
Compute Units
12
1024
Shading Units
768
64
TMUs
48
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
1024 KB
Theoretical Performance
30.66 GPixel/s
Pixel Rate
14.51 GPixel/s
61.31 GTexel/s
Texture Rate
43.54 GTexel/s
-
FP16 (half)
1393 GFLOPS
1.962 TFLOPS
FP32 (float)
1393 GFLOPS
122.6 GFLOPS
FP64 (double)
87.07 GFLOPS
Graphics Processor
Pitcairn
GPU Name
Polaris 21
Pitcairn PRO (215-0828062)
GPU Variant
Polaris 21 PRO
GCN 1.0
Architecture
GCN 4.0
TSMC
Foundry
GlobalFoundries
28 nm
Process Size
14 nm
2.8 billion
Transistors
3 billion
212 mm²
Die Size
123 mm²
Board Design
80W
TDP
75W
-
Suggested PSU
-
No outputs
Outputs
No outputs
None
Power Connectors
None
Graphics Features
12 (11_1)
DirectX
12 (12_0)
4.6
OpenGL
4.6
1.2
OpenCL
2.1
1.2
Vulkan
1.2
-
CUDA
-
5.1
Shader Model
6.4
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8
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