Radeon RX 550 vs Radeon HD 4855

Radeon RX 550
Memory: 4096Mb GDDR5DESKTOP
Release date: 1 Apr 2017
Radeon RX 550
Radeon HD 4855
Memory: 512Mb GDDR5DESKTOP
Release date: 3 Jan 2010
Radeon HD 4855


Reasons to consider Radeon RX 550

This is a much newer product, it might have better long term support.
Higher theoretical gaming performance, based on specifications.
Supports Direct3D 12 Async Compute.
Supports FreeSync.
Supports ReLive (allows game streaming/recording with minimum performance penalty).
Supports TrueAudio.

Reasons to consider Radeon HD 4855

Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications.

Radeon RX 550

HWBench recommends Radeon RX 550

Based on theoretical specifications.


Core Configuration

Radeon RX 550Radeon HD 4855
GPU NamePolaris 12 (Baffin XT)vsRV770 (RV770 PRO)
Fab Process14 nmvs55 nm
Die Size0 mm²vs256 mm²
Transistorsunknownvs956 million
Compute Units10vs8
Core clock1125 MHzvs575 MHz

Memory Configuration

Radeon RX 550Radeon HD 4855
Memory TypeGDDR5vsGDDR5
Bus Width128 bitvs256 bit
Memory Speed1750 MHz
7000 MHz effective
vs900 MHz
3600 MHz effective
Memory Size4096 Mbvs512 Mb

Additional details

Radeon RX 550Radeon HD 4855
TDP0 wattsvs110 watts
Release Date1 Apr 2017vs3 Jan 2010

Raw Performance comparison

Pixel Rate

  • Radeon RX 550
    20.83 GP/s
  • Radeon HD 4855
    9.20 GP/s

GigaPixels - higher is better

Texel Rate

  • Radeon RX 550
    52.10 GT/s
  • Radeon HD 4855
    18.40 GT/s

GigaTexels - higher is better

Memory bandwidth

  • Radeon RX 550
    112.00 GB/s
  • Radeon HD 4855
    115.00 GB/s

GB/s - higher is better

Single precision performance

  • Radeon RX 550
    1666.60 GFLOPs
  • Radeon HD 4855
    736.00 GFLOPs

GFLOPs - higher is better