ATI Radeon HD 4870 X2 vs AMD Radeon HD 6970

VS

ATI Radeon HD 4870 X2

AMD Radeon HD 6970

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 2GB VRAM Radeon HD 6970 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 4 months late

More VRAM (2GB vs 1024GB)

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

736 additional rendering cores

Lower TDP (250W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon HD 6970 +125%

2.703 TFLOPS

Radeon HD 4870 X2

VS

Radeon HD 6970

Graphics Card

Aug 2008

Release Date

Dec 2010

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

1375 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

176.0GB/s

Render Config

10

Compute Units

24

-

800

Shading Units

1536

40

TMUs

96

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

28.16 GPixel/s

30.00 GTexel/s

Texture Rate

84.48 GTexel/s

-

1200 GFLOPS

FP32 (float)

2.703 TFLOPS

240.0 GFLOPS

FP64 (double)

675.8 GFLOPS

Board Design

286W

TDP

250W

600 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

R700

GPU Name

Cayman

R700 XT (215-0669045)

GPU Variant

Cayman XT (215-0807007)

TeraScale

Architecture

TeraScale 3

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

2.64 billion

256 mm²

Die Size

389 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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