Radeon R5 M255 and Radeon HD 6850M - video card comparison

Radeon R5 M255

Radeon HD 6850M

Architecture

GCN (2011−2017)

Terascale 2 (2009−2015)

GPU code name

Topaz Pro / Sun

Granville Pro/LP

Market segment

Laptop

Laptop

Release date

May 2014

January 2011

Bus support

PCIe 3.0 x8

-

Interface

PCIe 3.0 x8

PCIe 2.0 x16

Boost clock speed

940 MHz

-

Compute units

5

-

Core clock speed

940 MHz

575 / 675 MHz

Floating-point performance

721.9 gflops

1,080.0 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

1,550 million

1,040 million

Pipelines / CUDA cores

320

800

Power consumption (TDP)

-

50 Watt

Texture fill rate

22.56

27.00

Memory type

DDR3

DDR3, GDDR5

Maximum RAM amount

4 GB

1 GB

Memory bus width

64 Bit

128 Bit

Memory clock speed

1000 MHz

800 MHz

Memory bandwidth

16 GB/s

25.6 GB/s

Shared memory

-

-

Display Connectors

No outputs

No outputs

Eyefinity

+

-

DirectX

DirectX® 11

11.2 (11_0)

Mantle

+

-

OpenCL

Not Listed

1.2

OpenGL

4.4

4.4

Shader Model

6.3

5.0

Vulkan

-

N/A

AppAcceleration

+

-

DualGraphics

1

-

Enduro

-

-

HD3D

+

-

PowerTune

+

-

Switchable graphics

1

-

TrueAudio

-

-

ZeroCore

+

-