AMD Radeon R9 290X vs AMD Radeon R9 390 X2

VS

AMD Radeon R9 290X

AMD Radeon R9 390 X2

We compared two Desktop platform GPUs: 4GB VRAM Radeon R9 290X and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 290X 's Advantages

256 additional rendering cores

Lower TDP (290W vs 580W)

AMD Radeon R9 390 X2 's Advantages

Released 1 years and 11 months late

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (345.6GB/s vs 320.0GB/s)

Score

Benchmark

FP32 (float)

Radeon R9 290X +10%

5.632 TFLOPS

Radeon R9 390 X2

5.12 TFLOPS

Radeon R9 290X

VS

Radeon R9 390 X2

Graphics Card

Oct 2013

Release Date

Sep 2015

Volcanic Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

1350 MHz

Memory

4GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

512bit

320.0GB/s

Bandwidth

345.6GB/s

Render Config

44

Compute Units

40

-

2816

Shading Units

2560

176

TMUs

160

64

ROPs

64

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

1024 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

64.00 GPixel/s

176.0 GTexel/s

Texture Rate

160.0 GTexel/s

-

5.632 TFLOPS

FP32 (float)

5.120 TFLOPS

704.0 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

290W

TDP

580W

600 W

Suggested PSU

950 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

4x 8-pin

Graphics Processor

Hawaii

GPU Name

Grenada

Hawaii XT (215-0852000)

GPU Variant

Grenada PRO (215-0880030)

GCN 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

6.2 billion

438 mm²

Die Size

438 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.0

OpenCL

2.0

1.2

Vulkan

1.2

-

6.3

Shader Model

6.3

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