AMD Radeon HD 7970 GHz Edition vs AMD Radeon HD 6870 X2

VS

AMD Radeon HD 7970 GHz Edition

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 GHz Edition and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 GHz Edition 's Advantages

Released 11 months late

Boost Clock1050MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (288.0GB/s vs 134.4GB/s)

928 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7970 GHz Edition +113%

4.301 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 7970 GHz Edition

VS

Radeon HD 6870 X2

Graphics Card

Jun 2012

Release Date

Jul 2011

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1050 MHz

Boost Clock

-

1500 MHz

Memory Clock

1050 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

134.4GB/s

Render Config

32

Compute Units

14

-

2048

Shading Units

1120

128

TMUs

56

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

33.60 GPixel/s

Pixel Rate

28.80 GPixel/s

134.4 GTexel/s

Texture Rate

50.40 GTexel/s

-

4.301 TFLOPS

FP32 (float)

2.016 TFLOPS

1075 GFLOPS

FP64 (double)

-

Board Design

300W

TDP

300W

700 W

Suggested PSU

700 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

-

Graphics Processor

Tahiti

GPU Name

Barts

Tahiti XT2 (215-0821065)

GPU Variant

Barts XT (215-0798000)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

1.7 billion

352 mm²

Die Size

255 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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