AMD Radeon HD 6870 X2 vs AMD Radeon HD 6950

VS

AMD Radeon HD 6870 X2

AMD Radeon HD 6950

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 2GB VRAM Radeon HD 6950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Released 7 months late

AMD Radeon HD 6950 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (160.0GB/s vs 134.4GB/s)

288 additional rendering cores

Lower TDP (200W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 6950 +11%

2.253 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 6950

Graphics Card

Jul 2011

Release Date

Dec 2010

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

160.0GB/s

Render Config

14

Compute Units

22

-

1120

Shading Units

1408

56

TMUs

88

32

ROPs

32

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

25.60 GPixel/s

50.40 GTexel/s

Texture Rate

70.40 GTexel/s

-

2.016 TFLOPS

FP32 (float)

2.253 TFLOPS

-

FP64 (double)

563.2 GFLOPS

Board Design

300W

TDP

200W

700 W

Suggested PSU

550 W

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

Outputs

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

-

Power Connectors

2x 6-pin

Graphics Processor

Barts

GPU Name

Cayman

Barts XT (215-0798000)

GPU Variant

Cayman PRO (215-0807019)

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

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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