Radeon RX 480 vs Radeon HD 6870 X2

Radeon RX 480
Memory: 8192Mb GDDR5 DESKTOP
Release date: 29 Jun 2016
Radeon RX 480

Radeon HD 6870 X2
Memory: 1024Mb GDDR5 DESKTOP
Release date: 8 Jul 2011
Radeon HD 6870 X2

Summary

Reasons to consider Radeon RX 480

150 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 6870 X2 .
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 6870 X2

Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications.

Radeon RX 480

HWBench recommends Radeon RX 480

Based on game and synthetic benchmarks, and theoretical specifications.

Specifications

Core Configuration

Radeon RX 480 Radeon HD 6870 X2
GPU Name Ellesmere (Ellesmere XT) vs Barts (Barts XT)
Fab Process 14 nm vs 40 nm
Die Size 232 mm² vs 255 mm²
Transistors 5,700 million vs 1,700 million
Shaders 2304 vs 1120
Compute Units 36 vs 14
Core clock 1120 MHz vs 900 MHz
ROPs 32 vs 32
TMUs 144 vs 56

Memory Configuration

Radeon RX 480 Radeon HD 6870 X2
Memory Type GDDR5 vs GDDR5
Bus Width 256 bit vs 256 bit x2
Memory Speed 2000 MHz
8000 MHz effective
vs 1050 MHz
4200 MHz effective
Memory Size 8192 Mb vs 1024 Mb

Additional details

Radeon RX 480 Radeon HD 6870 X2
TDP 150 watts vs 300 watts
Release Date 29 Jun 2016 vs 8 Jul 2011

Raw Performance comparison

Pixel Rate

  • Radeon RX 480
    40.50 GP/s
  • Radeon HD 6870 X2
    57.60 GP/s

GigaPixels - higher is better

Texel Rate

  • Radeon RX 480
    182.30 GT/s
  • Radeon HD 6870 X2
    100.80 GT/s

GigaTexels - higher is better

Memory bandwidth

  • Radeon RX 480
    256.00 GB/s
  • Radeon HD 6870 X2
    268.00 GB/s

GB/s - higher is better

Single precision performance

  • Radeon RX 480
    5834.00 GFLOPs
  • Radeon HD 6870 X2
    4032.00 GFLOPs

GFLOPs - higher is better