AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 6850 X2

VS

AMD Radeon HD 7870 GHz Edition

AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition 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 7870 GHz Edition 's Advantages

Released 6 months late

Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)

320 additional rendering cores

Lower TDP (175W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition +66%

2.56 TFLOPS

Radeon HD 6850 X2

1.536 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon HD 6850 X2

Graphics Card

Mar 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

-

1200 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

134.4GB/s

Render Config

20

Compute Units

12

-

1280

Shading Units

960

80

TMUs

48

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

25.60 GPixel/s

80.00 GTexel/s

Texture Rate

38.40 GTexel/s

-

2.560 TFLOPS

FP32 (float)

1.536 TFLOPS

160.0 GFLOPS

FP64 (double)

-

Board Design

175W

TDP

254W

450 W

Suggested PSU

600 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Pitcairn

GPU Name

Barts

Pitcairn XT (215-0828047)

GPU Variant

Barts PRO (215-0798006)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

1.7 billion

212 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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