AMD Radeon R9 285 vs AMD Radeon HD 6770 Green Edition

VS

AMD Radeon R9 285

AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 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 R9 285 's Advantages

Released 1 years and 5 months late

Larger VRAM bandwidth (176.0GB/s vs 21.34GB/s)

1072 additional rendering cores

AMD Radeon HD 6770 Green Edition 's Advantages

Lower TDP (86W vs 190W)

Score

Benchmark

FP32 (float)

Radeon R9 285 +226%

3.29 TFLOPS

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon R9 285

VS

Radeon HD 6770 Green Edition

Graphics Card

Sep 2014

Release Date

Apr 2013

Volcanic Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

667 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

176.0GB/s

Bandwidth

21.34GB/s

Render Config

28

Compute Units

9

-

1792

Shading Units

720

112

TMUs

36

32

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

29.38 GPixel/s

Pixel Rate

11.20 GPixel/s

102.8 GTexel/s

Texture Rate

25.20 GTexel/s

3.290 TFLOPS

FP16 (half)

-

3.290 TFLOPS

FP32 (float)

1008 GFLOPS

205.6 GFLOPS

FP64 (double)

-

Board Design

190W

TDP

86W

450 W

Suggested PSU

250 W

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

Outputs

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

2x 6-pin

Power Connectors

-

Graphics Processor

Tonga

GPU Name

Juniper

Tonga PRO (215-0851128)

GPU Variant

Juniper LE (215-0754009)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

1.04 billion

366 mm²

Die Size

166 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.2.170

Vulkan

N/A

-

6.5

Shader Model

5.0

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