AMD Radeon HD 7970M vs AMD Radeon R5 M255

VS

AMD Radeon HD 7970M

AMD Radeon R5 M255

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 7970M 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 HD 7970M 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 32.00GB/s)

896 additional rendering cores

AMD Radeon R5 M255 's Advantages

Released 2 years and 6 months late

Boost Clock940MHz

Score

Benchmark

FP32 (float)

Radeon HD 7970M +201%

2.176 TFLOPS

Radeon R5 M255

0.721 TFLOPS

Radeon HD 7970M

VS

Radeon R5 M255

Graphics Card

Apr 2012

Release Date

Oct 2014

London

Generation

Gem System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

940 MHz

1200 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

153.6GB/s

Bandwidth

32.00GB/s

Render Config

20

Compute Units

6

-

1280

Shading Units

384

80

TMUs

24

32

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

27.20 GPixel/s

Pixel Rate

7.520 GPixel/s

68.00 GTexel/s

Texture Rate

22.56 GTexel/s

-

FP16 (half)

721.9 GFLOPS

2.176 TFLOPS

FP32 (float)

721.9 GFLOPS

136.0 GFLOPS

FP64 (double)

45.12 GFLOPS

Board Design

100W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Wimbledon

GPU Name

Topaz

Wimbledon XT (216-0836036)

GPU Variant

Topaz PRO (216-0858030)

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

1.55 billion

212 mm²

Die Size

125 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.2.170

-

5.1

Shader Model

6.5

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