AMD Radeon HD 6970 vs ATI Radeon HD 4870

VS

AMD Radeon HD 6970

ATI Radeon HD 4870

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6970 and 512MB VRAM Radeon HD 4870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6970 's Advantages

Released 2 years and 6 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (176.0GB/s vs 115.2GB/s)

736 additional rendering cores

ATI Radeon HD 4870 's Advantages

Lower TDP (150W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 6970 +125%

2.703 TFLOPS

Radeon HD 4870

1.2 TFLOPS

Radeon HD 6970

VS

Radeon HD 4870

Graphics Card

Dec 2010

Release Date

Jun 2008

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

176.0GB/s

Bandwidth

115.2GB/s

Render Config

24

Compute Units

10

-

1536

Shading Units

800

96

TMUs

40

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.16 GPixel/s

Pixel Rate

12.00 GPixel/s

84.48 GTexel/s

Texture Rate

30.00 GTexel/s

-

2.703 TFLOPS

FP32 (float)

1200 GFLOPS

675.8 GFLOPS

FP64 (double)

240.0 GFLOPS

Board Design

250W

TDP

150W

600 W

Suggested PSU

450 W

2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

2x DVI 1x S-Video

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Cayman

GPU Name

RV770

Cayman XT (215-0807007)

GPU Variant

RV770 XT (215-0669049)

TeraScale 3

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

2.64 billion

Transistors

0.956 billion

389 mm²

Die Size

256 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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