AMD Radeon R9 285X vs AMD Radeon HD 6870 1600SP Edition

VS

AMD Radeon R9 285X

AMD Radeon HD 6870 1600SP Edition

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 1024MB VRAM Radeon HD 6870 1600SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285X 's Advantages

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)

448 additional rendering cores

AMD Radeon HD 6870 1600SP Edition 's Advantages

Lower TDP (175W vs 200W)

Score

Benchmark

FP32 (float)

Radeon R9 285X +50%

4.104 TFLOPS

Radeon HD 6870 1600SP Edition

2.72 TFLOPS

Radeon R9 285X

VS

Radeon HD 6870 1600SP Edition

Graphics Card

Unknown

Release Date

Jan 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

1050 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

134.4GB/s

Render Config

32

Compute Units

20

-

2048

Shading Units

1600

128

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

32.06 GPixel/s

Pixel Rate

27.20 GPixel/s

128.3 GTexel/s

Texture Rate

68.00 GTexel/s

-

4.104 TFLOPS

FP32 (float)

2.720 TFLOPS

-

FP64 (double)

544.0 GFLOPS

Board Design

200W

TDP

175W

550 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Tonga

GPU Name

Cypress

Tonga XT (215-0851313)

GPU Variant

Cypress XT (215-0735033)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

2.154 billion

366 mm²

Die Size

334 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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