AMD Radeon HD 7970 X2 vs AMD Radeon HD 6850 X2

VS

AMD Radeon HD 7970 X2

AMD Radeon HD 6850 X2

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

Main Differences

AMD Radeon HD 7970 X2 's Advantages

Released 11 months late

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)

1088 additional rendering cores

AMD Radeon HD 6850 X2 's Advantages

Lower TDP (254W vs 500W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 X2 +146%

3.789 TFLOPS

Radeon HD 6850 X2

1.536 TFLOPS

Radeon HD 7970 X2

VS

Radeon HD 6850 X2

Graphics Card

Aug 2012

Release Date

Sep 2011

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1050 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

134.4GB/s

Render Config

32

Compute Units

12

-

2048

Shading Units

960

128

TMUs

48

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

25.60 GPixel/s

118.4 GTexel/s

Texture Rate

38.40 GTexel/s

-

3.789 TFLOPS

FP32 (float)

1.536 TFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

500W

TDP

254W

900 W

Suggested PSU

600 W

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

Outputs

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

3x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

New Zealand

GPU Name

Barts

-

GPU Variant

Barts PRO (215-0798006)

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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