AMD Radeon HD 6870 X2 vs AMD Radeon HD 7770 GHz Edition

VS

AMD Radeon HD 6870 X2

AMD Radeon HD 7770 GHz Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 1024MB VRAM Radeon HD 7770 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 72.00GB/s)

480 additional rendering cores

AMD Radeon HD 7770 GHz Edition 's Advantages

Released 7 months late

Lower TDP (80W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +57%

2.016 TFLOPS

Radeon HD 7770 GHz Edition

1.28 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 7770 GHz Edition

Graphics Card

Jul 2011

Release Date

Feb 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

1125 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

72.00GB/s

Render Config

14

Compute Units

10

-

1120

Shading Units

640

56

TMUs

40

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

16.00 GPixel/s

50.40 GTexel/s

Texture Rate

40.00 GTexel/s

-

2.016 TFLOPS

FP32 (float)

1280 GFLOPS

-

FP64 (double)

80.00 GFLOPS

Board Design

300W

TDP

80W

700 W

Suggested PSU

250 W

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

Outputs

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

-

Power Connectors

1x 6-pin

Graphics Processor

Barts

GPU Name

Cape Verde

Barts XT (215-0798000)

GPU Variant

Cape Verde XT

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

1.5 billion

255 mm²

Die Size

123 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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