AMD Radeon HD 6870 vs ATI Radeon HD 4700

VS

AMD Radeon HD 6870

ATI Radeon HD 4700

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 512MB VRAM Radeon HD 4700 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 's Advantages

Released 8 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 12.80GB/s)

800 additional rendering cores

ATI Radeon HD 4700 's Advantages

Lower TDP (50W vs 151W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 +425%

2.016 TFLOPS

Radeon HD 4700

0.384 TFLOPS

Radeon HD 6870

VS

Radeon HD 4700

Graphics Card

Oct 2010

Release Date

Feb 2010

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

12.80GB/s

Render Config

14

Compute Units

4

-

1120

Shading Units

320

56

TMUs

32

ROPs

8

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

4.800 GPixel/s

50.40 GTexel/s

Texture Rate

19.20 GTexel/s

-

2.016 TFLOPS

FP32 (float)

384.0 GFLOPS

-

Board Design

151W

TDP

50W

450 W

Suggested PSU

250 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

-

Graphics Processor

Barts

GPU Name

RV730

Barts XT (215-0798000)

GPU Variant

RV730 CE

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.514 billion

255 mm²

Die Size

146 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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