AMD Radeon HD 6870 vs AMD Radeon HD 6970

VS

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 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 6870 's Advantages

Lower TDP (151W vs 250W)

AMD Radeon HD 6970 's Advantages

More VRAM (2GB vs 1GB)

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

416 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6870

2.016 TFLOPS

Radeon HD 6970 +34%

2.703 TFLOPS

Radeon HD 6870

VS

Radeon HD 6970

Graphics Card

Oct 2010

Release Date

Dec 2010

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

1375 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

176.0GB/s

Render Config

-

SM Count

-

14

Compute Units

24

1120

Shading Units

1536

56

TMUs

96

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

28.16 GPixel/s

50.40 GTexel/s

Texture Rate

84.48 GTexel/s

-

FP16 (half)

-

2.016 TFLOPS

FP32 (float)

2.703 TFLOPS

-

FP64 (double)

675.8 GFLOPS

Graphics Processor

Barts

GPU Name

Cayman

Barts XT (215-0798000)

GPU Variant

Cayman XT (215-0807007)

TeraScale 2

Architecture

TeraScale 3

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

2.64 billion

255 mm²

Die Size

389 mm²

Board Design

151W

TDP

250W

450 W

Suggested PSU

600 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

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

-

CUDA

-

5.0

Shader Model

5.0

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