AMD Radeon R9 390X vs AMD Radeon HD 7790

VS

AMD Radeon R9 390X

AMD Radeon HD 7790

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 1024MB VRAM Radeon HD 7790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

Released 2 years and 3 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (384.0GB/s vs 96.00GB/s)

1920 additional rendering cores

AMD Radeon HD 7790 's Advantages

Lower TDP (85W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +230%

5.914 TFLOPS

Radeon HD 7790

1.792 TFLOPS

Radeon R9 390X

VS

Radeon HD 7790

Graphics Card

Jun 2015

Release Date

Mar 2013

Pirate Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

1500 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

128bit

384.0GB/s

Bandwidth

96.00GB/s

Render Config

44

Compute Units

14

-

2816

Shading Units

896

176

TMUs

56

64

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

16.00 GPixel/s

184.8 GTexel/s

Texture Rate

56.00 GTexel/s

-

5.914 TFLOPS

FP32 (float)

1.792 TFLOPS

739.2 GFLOPS

FP64 (double)

112.0 GFLOPS

Board Design

275W

TDP

85W

600 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Grenada

GPU Name

Bonaire

Grenada XT (215-0880004)

GPU Variant

Bonaire XT (215-0839039)

GCN 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

2.08 billion

438 mm²

Die Size

160 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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