Radeon HD 6850 and Radeon HD 4860 - video card comparison

Radeon HD 6850

Radeon HD 4860

Architecture

TeraScale 2 (2009−2015)

TeraScale (2005−2013)

GPU code name

Barts

RV790

Market segment

Desktop

Desktop

Release date

October 2010

September 2009

Bus support

AGP

-

Interface

PCIe 2.0 x16

PCIe 2.0 x16

Supplementary power connectors

1x 6-pin

2x 6-pin

Core clock speed

-

700 MHz

Floating-point performance

1,488.0 gflops

896.0 gflops

Manufacturing process technology

40 nm

55 nm

Number of transistors

1,700 million

959 million

Pipelines / CUDA cores

960

640

Power consumption (TDP)

127 Watt

130 Watt

Texture fill rate

37.20

22.40

Memory type

GDDR5

GDDR5

Maximum RAM amount

1 GB

512 MB

Memory bus width

256 Bit

256 Bit

Memory clock speed

-

3000 MHz

Memory bandwidth

128.0 GB/s

96 GB/s

Display Connectors

2x DVI, 1x HDMI, 2x mini-DisplayPort

2x DVI, 1x S-Video

Eyefinity

1

-

HDMI

+

-

DisplayPort support

-

-

DirectX

DirectX® 11

10.1 (10_1)

Mantle

-

-

OpenCL

1.2

1.1

OpenGL

4.4

3.3

Shader Model

5.0

4.1

Vulkan

-

N/A

AppAcceleration

-

-

CrossFire

1

-

Enduro

-

-

HD3D

-

-

PowerTune

-

-

TrueAudio

-

-

ZeroCore

-

-