AMD Radeon R5 A255 vs AMD Radeon HD 6870M

VS

AMD Radeon R5 A255

AMD Radeon HD 6870M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon R5 A255 and 1024MB VRAM Radeon HD 6870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R5 A255 's Advantages

Released 3 years late

Boost Clock940MHz

AMD Radeon HD 6870M 's Advantages

416 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R5 A255

0.721 TFLOPS

Radeon HD 6870M +49%

1.08 TFLOPS

Radeon R5 A255

VS

Radeon HD 6870M

Graphics Card

Jan 2014

Release Date

Jan 2011

All-In-One

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

925 MHz

Base Clock

-

940 MHz

Boost Clock

-

1000 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

64.00GB/s

Render Config

6

Compute Units

10

-

384

Shading Units

800

24

TMUs

40

8

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

7.520 GPixel/s

Pixel Rate

10.80 GPixel/s

22.56 GTexel/s

Texture Rate

27.00 GTexel/s

-

721.9 GFLOPS

FP32 (float)

1080 GFLOPS

-

Board Design

Unknown

TDP

50W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Topaz

GPU Name

Granville

Topaz PRO (216-0858030)

GPU Variant

Granville XT (216-0769024)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.55 billion

Transistors

1.04 billion

125 mm²

Die Size

166 mm²

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

-

6.5

Shader Model

5.0

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