AMD Radeon R9 280 vs AMD Radeon R9 390X

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 8GB VRAM Radeon R9 390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280 's Advantages

Boost Clock933MHz

Lower TDP (200W vs 275W)

AMD Radeon R9 390X 's Advantages

Released 1 years and 3 months late

More VRAM (8GB vs 3GB)

Larger VRAM bandwidth (384.0GB/s vs 240.0GB/s)

1024 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 280

3.344 TFLOPS

Radeon R9 390X +76%

5.914 TFLOPS

3DMark Time Spy

Radeon R9 280

2009

Radeon R9 390X +111%

4245

Radeon R9 280

VS

Radeon R9 390X

Graphics Card

Mar 2014

Release Date

Jun 2015

Volcanic Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

827 MHz

Base Clock

-

933 MHz

Boost Clock

-

1250 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

512bit

240.0GB/s

Bandwidth

384.0GB/s

Render Config

-

SM Count

-

28

Compute Units

44

1792

Shading Units

2816

112

TMUs

176

32

ROPs

64

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

1024 KB

Theoretical Performance

29.86 GPixel/s

Pixel Rate

67.20 GPixel/s

104.5 GTexel/s

Texture Rate

184.8 GTexel/s

-

FP16 (half)

-

3.344 TFLOPS

FP32 (float)

5.914 TFLOPS

836.0 GFLOPS

FP64 (double)

739.2 GFLOPS

Graphics Processor

Tahiti

GPU Name

Grenada

Tahiti PRO3 (215-0821330)

GPU Variant

Grenada XT (215-0880004)

GCN 1.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

6.2 billion

352 mm²

Die Size

438 mm²

Board Design

200W

TDP

275W

550 W

Suggested PSU

600 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.3

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