AMD Radeon HD 6970 vs AMD Radeon HD 6870 X2

VS

AMD Radeon HD 6970

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6970 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 6970 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (176.0GB/s vs 134.4GB/s)

416 additional rendering cores

Lower TDP (250W vs 300W)

AMD Radeon HD 6870 X2 's Advantages

Released 7 months late

Score

Benchmark

FP32 (float)

Radeon HD 6970 +34%

2.703 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 6970

VS

Radeon HD 6870 X2

Graphics Card

Dec 2010

Release Date

Jul 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

176.0GB/s

Bandwidth

134.4GB/s

Render Config

24

Compute Units

14

-

1536

Shading Units

1120

96

TMUs

56

32

ROPs

32

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

28.16 GPixel/s

Pixel Rate

28.80 GPixel/s

84.48 GTexel/s

Texture Rate

50.40 GTexel/s

-

2.703 TFLOPS

FP32 (float)

2.016 TFLOPS

675.8 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

300W

600 W

Suggested PSU

700 W

2x 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

Cayman

GPU Name

Barts

Cayman XT (215-0807007)

GPU Variant

Barts XT (215-0798000)

TeraScale 3

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

1.7 billion

389 mm²

Die Size

255 mm²

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

5.0

Shader Model

5.0

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