HWBench.com

    Radeon R9 255 OEM vs Radeon R7 340 OEM

    Radeon R9 255 OEM
    Memory: 2048Mb GDDR5DESKTOP
    Release date: 21 Dec 2013
    Radeon R9 255 OEM
    Radeon R7 340 OEM
    Memory: 2048Mb DDR3DESKTOP
    Release date: 5 May 2015
    Radeon R7 340 OEM

    Summary

    Reasons to consider Radeon R9 255 OEM

    Higher theoretical gaming performance, based on specifications.
    Supports Direct3D 12 Async Compute
    Supports ReLive (allows game streaming/recording with minimum performance penalty)
    Supports Mantle
    Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications

    Reasons to consider Radeon R7 340 OEM

    This is a much newer product, it might have better long term support.
    Supports Direct3D 12 Async Compute
    Supports ReLive (allows game streaming/recording with minimum performance penalty)
    Supports Mantle
    Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications
    Radeon R9 255 OEM

    HWBench recommends Radeon R9 255 OEM

    Based on theoretical specifications.

    Specifications

    Core Configuration

    Radeon R9 255 OEMRadeon R7 340 OEM
    GPU NameCape Verde (Cape Verde PRX)vsOland ()
    Fab Process28 nmvs28 nm
    Die Size123 mm²vs90 mm²
    Transistors1,500 millionvs1,040 million
    Shaders512vs384
    Compute Units8vs6
    Core clock900 MHzvs730 MHz
    ROPs16vs8
    TMUs32vs24

    Memory Configuration

    Radeon R9 255 OEMRadeon R7 340 OEM
    Memory TypeGDDR5vsDDR3
    Bus Width128 bitvs128 bit
    Memory Speed1150 MHz
    4600 MHz effective    		vs900 MHz
    1800 MHz effective
    Memory Size2048 Mbvs2048 Mb

    Additional details

    Radeon R9 255 OEMRadeon R7 340 OEM
    TDP65 wattsvs50 watts
    Release Date21 Dec 2013vs5 May 2015

    Raw Performance comparison

    Pixel Rate

    • Radeon R9 255 OEM
      14.40 GP/s
    • Radeon R7 340 OEM
      5.84 GP/s

    GigaPixels - higher is better

    Texel Rate

    • Radeon R9 255 OEM
      28.80 GT/s
    • Radeon R7 340 OEM
      17.50 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • Radeon R9 255 OEM
      73.60 GB/s
    • Radeon R7 340 OEM
      28.80 GB/s

    GB/s - higher is better

    Single precision performance

    • Radeon R9 255 OEM
      921.60 GFLOPs
    • Radeon R7 340 OEM
      560.60 GFLOPs

    GFLOPs - higher is better

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