AMD Radeon RX 550X vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon RX 550X

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 550X and 2GB VRAM Radeon HD 7870 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550X 's Advantages

Released 6 years and 9 months late

Boost Clock1183MHz

More VRAM (4GB vs 2GB)

Lower TDP (50W vs 175W)

AMD Radeon HD 7870 GHz Edition 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 96.00GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 550X

1.211 TFLOPS

Radeon HD 7870 GHz Edition +111%

2.56 TFLOPS

Radeon RX 550X

VS

Radeon HD 7870 GHz Edition

Graphics Card

Dec 2018

Release Date

Mar 2012

Polaris

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1100 MHz

Base Clock

-

1183 MHz

Boost Clock

-

1500 MHz

Memory Clock

1200 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

96.00GB/s

Bandwidth

153.6GB/s

Render Config

8

Compute Units

20

-

512

Shading Units

1280

32

TMUs

80

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

18.93 GPixel/s

Pixel Rate

32.00 GPixel/s

37.86 GTexel/s

Texture Rate

80.00 GTexel/s

1211 GFLOPS

FP16 (half)

-

1211 GFLOPS

FP32 (float)

2.560 TFLOPS

75.71 GFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

50W

TDP

175W

250 W

Suggested PSU

450 W

1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Processor

Lexa

GPU Name

Pitcairn

Lexa PRO (215-0904018)

GPU Variant

Pitcairn XT (215-0828047)

GCN 4.0

Architecture

GCN 1.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

2.8 billion

103 mm²

Die Size

212 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

Vulkan

1.2

-

6.4

Shader Model

5.1

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