AMD Radeon HD 6770 Green Edition vs AMD Radeon HD 6870

VS

AMD Radeon HD 6770 Green Edition AMD Radeon HD 6870

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6770 Green Edition and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770 Green Edition 's Advantages

Released 2 years and 6 months late

More VRAM (2GB vs 1GB)

Lower TDP (86W vs 151W)

AMD Radeon HD 6870 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 21.34GB/s)

400 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 6870 +100%

2.016 TFLOPS

Radeon HD 6770 Green Edition

VS

Radeon HD 6870

Graphics Card

Apr 2013

Release Date

Oct 2010

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

667 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

21.34GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

9

Compute Units

14

720

Shading Units

1120

36

TMUs

56

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

11.20 GPixel/s

Pixel Rate

28.80 GPixel/s

25.20 GTexel/s

Texture Rate

50.40 GTexel/s

-

FP16 (half)

-

1008 GFLOPS

FP32 (float)

2.016 TFLOPS

-

FP64 (double)

-

Graphics Processor

Juniper

GPU Name

Barts

Juniper LE (215-0754009)

GPU Variant

Barts XT (215-0798000)

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.04 billion

Transistors

1.7 billion

166 mm²

Die Size

255 mm²

Board Design

86W

TDP

151W

250 W

Suggested PSU

450 W

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

Outputs

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

-

Power Connectors

2x 6-pin

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

-

CUDA

-

5.0

Shader Model

5.0

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