AMD Radeon R9 280X2 vs AMD Radeon R9 390

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X2 and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280X2 's Advantages

Boost Clock1000MHz

AMD Radeon R9 390 's Advantages

More VRAM (8GB vs 3GB)

Larger VRAM bandwidth (384.0GB/s vs 288.0GB/s)

512 additional rendering cores

Lower TDP (275W vs 375W)

Score

Benchmark

FP32 (float)

Radeon R9 280X2

4.096 TFLOPS

Radeon R9 390 +25%

5.12 TFLOPS

Radeon R9 280X2

VS

Radeon R9 390

Graphics Card

Unknown

Release Date

Jun 2015

Volcanic Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

512bit

288.0GB/s

Bandwidth

384.0GB/s

Render Config

-

SM Count

-

32

Compute Units

40

2048

Shading Units

2560

128

TMUs

160

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

32.00 GPixel/s

Pixel Rate

64.00 GPixel/s

128.0 GTexel/s

Texture Rate

160.0 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

5.120 TFLOPS

1024 GFLOPS

FP64 (double)

640.0 GFLOPS

Graphics Processor

Tahiti

GPU Name

Grenada

Tahiti XTL (215-0821065)

GPU Variant

Grenada PRO (215-0880030)

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

375W

TDP

275W

750 W

Suggested PSU

600 W

6x mini-DisplayPort 1.2

Outputs

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

3x 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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