AMD Radeon HD 7970 vs AMD Radeon RX 455 OEM

VS

AMD Radeon HD 7970

AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 104.0GB/s)

1280 additional rendering cores

AMD Radeon RX 455 OEM 's Advantages

Released 4 years and 6 months late

Lower TDP (100W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +134%

3.789 TFLOPS

Radeon RX 455 OEM

1.613 TFLOPS

Radeon HD 7970

VS

Radeon RX 455 OEM

Graphics Card

Dec 2011

Release Date

Jun 2016

Southern Islands

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1625 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

264.0GB/s

Bandwidth

104.0GB/s

Render Config

32

Compute Units

12

-

2048

Shading Units

768

128

TMUs

48

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

16.80 GPixel/s

118.4 GTexel/s

Texture Rate

50.40 GTexel/s

-

3.789 TFLOPS

FP32 (float)

1.613 TFLOPS

947.2 GFLOPS

FP64 (double)

100.8 GFLOPS

Board Design

250W

TDP

100W

600 W

Suggested PSU

300 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

Tobago

Tahiti XT (215-0821060)

GPU Variant

Tobago PRO (215-0875010)

GCN 1.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.08 billion

352 mm²

Die Size

160 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

5.1

Shader Model

6.3

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