AMD Radeon R9 390 vs AMD Radeon R9 380X

VS

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 4GB VRAM Radeon R9 380X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390 's Advantages

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (384.0GB/s vs 182.4GB/s)

512 additional rendering cores

AMD Radeon R9 380X 's Advantages

Lower TDP (190W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390 +28%

5.12 TFLOPS

Radeon R9 380X

3.973 TFLOPS

3DMark Time Spy

Radeon R9 390 +29%

3953

Radeon R9 380X

3050

Radeon R9 390

VS

Radeon R9 380X

Graphics Card

Jun 2015

Release Date

Nov 2015

Pirate Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1500 MHz

Memory Clock

1425 MHz

Memory

8GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

182.4GB/s

Render Config

-

SM Count

-

40

Compute Units

32

2560

Shading Units

2048

160

TMUs

128

64

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

512 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

31.04 GPixel/s

160.0 GTexel/s

Texture Rate

124.2 GTexel/s

-

FP16 (half)

3.973 TFLOPS

5.120 TFLOPS

FP32 (float)

3.973 TFLOPS

640.0 GFLOPS

FP64 (double)

248.3 GFLOPS

Graphics Processor

Grenada

GPU Name

Antigua

Grenada PRO (215-0880030)

GPU Variant

Antigua XT (215-0877016)

GCN 2.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

5 billion

438 mm²

Die Size

366 mm²

Board Design

275W

TDP

190W

600 W

Suggested PSU

450 W

2x DVI 1x 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

2x 6-pin

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.0

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

6.3

Shader Model

6.3

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