AMD Radeon R5 M255 vs AMD Radeon HD 7470A

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We compared two Mobile platform GPUs: 2GB VRAM Radeon R5 M255 and 512MB VRAM Radeon HD 7470A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 M255 's Advantages

Released 2 years and 9 months late

Boost Clock940MHz

Larger VRAM bandwidth (32.00GB/s vs 12.80GB/s)

224 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R5 M255 +260%

0.721 TFLOPS

Radeon HD 7470A

0.2 TFLOPS

Radeon R5 M255

VS

Radeon HD 7470A

Graphics Card

Oct 2014

Release Date

Jan 2012

Gem System

Generation

All-In-One

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-A (3.0)

Clock Speeds

925 MHz

Base Clock

-

940 MHz

Boost Clock

-

1000 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

GDDR3

128bit

Memory Bus

64bit

32.00GB/s

Bandwidth

12.80GB/s

Render Config

-

SM Count

-

6

Compute Units

2

384

Shading Units

160

24

TMUs

8

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

Theoretical Performance

7.520 GPixel/s

Pixel Rate

2.500 GPixel/s

22.56 GTexel/s

Texture Rate

5.000 GTexel/s

721.9 GFLOPS

FP16 (half)

-

721.9 GFLOPS

FP32 (float)

200.0 GFLOPS

45.12 GFLOPS

FP64 (double)

-

Graphics Processor

Topaz

GPU Name

Caicos

Topaz PRO (216-0858030)

GPU Variant

-

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.55 billion

Transistors

0.37 billion

125 mm²

Die Size

67 mm²

Board Design

Unknown

TDP

25W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.2.170

Vulkan

N/A

-

CUDA

-

6.5

Shader Model

5.0

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