AMD Radeon R9 285 vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon R9 285

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 and 2GB VRAM Radeon HD 7870 GHz 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 2 years and 6 months late

Larger VRAM bandwidth (176.0GB/s vs 153.6GB/s)

512 additional rendering cores

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 190W)

Score

Benchmark

FP32 (float)

Radeon R9 285 +28%

3.29 TFLOPS

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon R9 285

VS

Radeon HD 7870 GHz Edition

Graphics Card

Sep 2014

Release Date

Mar 2012

Volcanic Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

176.0GB/s

Bandwidth

153.6GB/s

Render Config

28

Compute Units

20

-

1792

Shading Units

1280

112

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

29.38 GPixel/s

Pixel Rate

32.00 GPixel/s

102.8 GTexel/s

Texture Rate

80.00 GTexel/s

3.290 TFLOPS

FP16 (half)

-

3.290 TFLOPS

FP32 (float)

2.560 TFLOPS

205.6 GFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

190W

TDP

175W

450 W

Suggested PSU

450 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Tonga

GPU Name

Pitcairn

Tonga PRO (215-0851128)

GPU Variant

Pitcairn XT (215-0828047)

GCN 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

2.8 billion

366 mm²

Die Size

212 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

1.2.170

Vulkan

1.2

-

6.5

Shader Model

5.1

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