AMD Radeon HD 6870 1600SP Edition vs AMD Radeon HD 6770 Green Edition

VS

AMD Radeon HD 6870 1600SP Edition AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 1600SP Edition and 2GB VRAM Radeon HD 6770 Green Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 1600SP Edition 's Advantages

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

880 additional rendering cores

AMD Radeon HD 6770 Green Edition 's Advantages

More VRAM (2GB vs 1GB)

Lower TDP (86W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 1600SP Edition +169%

2.72 TFLOPS

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 6870 1600SP Edition

VS

Radeon HD 6770 Green Edition

Graphics Card

Jan 2013

Release Date

Apr 2013

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

667 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

21.34GB/s

Render Config

-

SM Count

-

20

Compute Units

9

1600

Shading Units

720

80

TMUs

36

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

Theoretical Performance

27.20 GPixel/s

Pixel Rate

11.20 GPixel/s

68.00 GTexel/s

Texture Rate

25.20 GTexel/s

-

FP16 (half)

-

2.720 TFLOPS

FP32 (float)

1008 GFLOPS

544.0 GFLOPS

FP64 (double)

-

Graphics Processor

Cypress

GPU Name

Juniper

Cypress XT (215-0735033)

GPU Variant

Juniper LE (215-0754009)

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.154 billion

Transistors

1.04 billion

334 mm²

Die Size

166 mm²

Board Design

175W

TDP

86W

450 W

Suggested PSU

250 W

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

Outputs

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

2x 6-pin

Power Connectors

-

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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