AMD Radeon R9 390X vs AMD Radeon HD 7970 GHz Edition

VS

AMD Radeon R9 390X

AMD Radeon HD 7970 GHz Edition

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 3GB VRAM Radeon HD 7970 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

Released 3 years late

More VRAM (8GB vs 3GB)

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

768 additional rendering cores

Lower TDP (275W vs 300W)

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock1050MHz

Score

Benchmark

FP32 (float)

Radeon R9 390X +37%

5.914 TFLOPS

Radeon HD 7970 GHz Edition

4.301 TFLOPS

Radeon R9 390X

VS

Radeon HD 7970 GHz Edition

Graphics Card

Jun 2015

Release Date

Jun 2012

Pirate Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1050 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

8GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

384bit

384.0GB/s

Bandwidth

288.0GB/s

Render Config

44

Compute Units

32

-

2816

Shading Units

2048

176

TMUs

128

64

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

768 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

33.60 GPixel/s

184.8 GTexel/s

Texture Rate

134.4 GTexel/s

-

5.914 TFLOPS

FP32 (float)

4.301 TFLOPS

739.2 GFLOPS

FP64 (double)

1075 GFLOPS

Board Design

275W

TDP

300W

600 W

Suggested PSU

700 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 + 1x 8-pin

Graphics Processor

Grenada

GPU Name

Tahiti

Grenada XT (215-0880004)

GPU Variant

Tahiti XT2 (215-0821065)

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

4.313 billion

438 mm²

Die Size

352 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.0

OpenCL

1.2

Vulkan

1.2

-

6.3

Shader Model

5.1

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