AMD Radeon HD 6850 X2 vs AMD Radeon HD 7970 GHz Edition

VS

AMD Radeon HD 6850 X2

AMD Radeon HD 7970 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 3GB VRAM Radeon HD 7970 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 X2 's Advantages

Lower TDP (254W vs 300W)

AMD Radeon HD 7970 GHz Edition 's Advantages

Released 9 months late

Boost Clock1050MHz

More VRAM (3GB vs 2GB)

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

1088 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2

1.536 TFLOPS

Radeon HD 7970 GHz Edition +180%

4.301 TFLOPS

Radeon HD 6850 X2

VS

Radeon HD 7970 GHz Edition

Graphics Card

Sep 2011

Release Date

Jun 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1050 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

134.4GB/s

Bandwidth

288.0GB/s

Render Config

12

Compute Units

32

-

960

Shading Units

2048

48

TMUs

128

32

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

33.60 GPixel/s

38.40 GTexel/s

Texture Rate

134.4 GTexel/s

-

1.536 TFLOPS

FP32 (float)

4.301 TFLOPS

-

FP64 (double)

1075 GFLOPS

Board Design

254W

TDP

300W

600 W

Suggested PSU

700 W

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

Outputs

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

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Barts

GPU Name

Tahiti

Barts PRO (215-0798006)

GPU Variant

Tahiti XT2 (215-0821065)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

4.313 billion

255 mm²

Die Size

352 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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