AMD Radeon Pro 555X vs AMD Radeon R5 M255

VS

AMD Radeon Pro 555X

AMD Radeon R5 M255

We compared two Mobile platform GPUs: 4GB VRAM Radeon Pro 555X and 2GB VRAM Radeon R5 M255 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Pro 555X 's Advantages

Released 3 years and 9 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (94.08GB/s vs 32.00GB/s)

384 additional rendering cores

AMD Radeon R5 M255 's Advantages

Boost Clock940MHz

Score

Benchmark

FP32 (float)

Radeon Pro 555X +93%

1.393 TFLOPS

Radeon R5 M255

0.721 TFLOPS

Radeon Pro 555X

VS

Radeon R5 M255

Graphics Card

Jul 2018

Release Date

Oct 2014

Radeon Pro Mac

Generation

Gem System

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

940 MHz

1470 MHz

Memory Clock

1000 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

94.08GB/s

Bandwidth

32.00GB/s

Render Config

12

Compute Units

6

-

768

Shading Units

384

48

TMUs

24

16

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

14.51 GPixel/s

Pixel Rate

7.520 GPixel/s

43.54 GTexel/s

Texture Rate

22.56 GTexel/s

1393 GFLOPS

FP16 (half)

721.9 GFLOPS

1393 GFLOPS

FP32 (float)

721.9 GFLOPS

87.07 GFLOPS

FP64 (double)

45.12 GFLOPS

Board Design

75W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Polaris 21

GPU Name

Topaz

Polaris 21 PRO

GPU Variant

Topaz PRO (216-0858030)

GCN 4.0

Architecture

GCN 3.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

3 billion

Transistors

1.55 billion

123 mm²

Die Size

125 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.2

Vulkan

1.2.170

-

6.4

Shader Model

6.5

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