AMD Radeon R9 285 vs AMD Radeon R9 280X2

VS

AMD Radeon R9 285

AMD Radeon R9 280X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 and 3GB VRAM Radeon R9 280X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285 's Advantages

Lower TDP (190W vs 375W)

AMD Radeon R9 280X2 's Advantages

Boost Clock1000MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 176.0GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 285

3.29 TFLOPS

Radeon R9 280X2 +24%

4.096 TFLOPS

Radeon R9 285

VS

Radeon R9 280X2

Graphics Card

Sep 2014

Release Date

Unknown

Volcanic Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

950 MHz

-

Boost Clock

1000 MHz

1375 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

176.0GB/s

Bandwidth

288.0GB/s

Render Config

28

Compute Units

32

-

1792

Shading Units

2048

112

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

29.38 GPixel/s

Pixel Rate

32.00 GPixel/s

102.8 GTexel/s

Texture Rate

128.0 GTexel/s

3.290 TFLOPS

FP16 (half)

-

3.290 TFLOPS

FP32 (float)

4.096 TFLOPS

205.6 GFLOPS

FP64 (double)

1024 GFLOPS

Board Design

190W

TDP

375W

450 W

Suggested PSU

750 W

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

Outputs

6x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

3x 8-pin

Graphics Processor

Tonga

GPU Name

Tahiti

Tonga PRO (215-0851128)

GPU Variant

Tahiti XTL (215-0821065)

GCN 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

4.313 billion

366 mm²

Die Size

352 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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