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1GB ATI Mobility Radeon HD5470 or 1GB ATI Mobility Radeon™ HD550v?

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  • 07-11-2010 1:08pm
    #1
    christo82
    Registered Users Posts: 737 ✭✭✭


    I'm having trouble finding a comparison between these cards on the web. It's for a laptop that will be used for some video editing. Which would be the better card?

    Thanks


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    #2
    Solitaire
    Moderators, Technology & Internet Moderators Posts: 18,377 Mod ✭✭✭✭Solitaire


    The HD550v appears to be the mobile incarnation of the unofficial "HD4630" card (a HD4650 GPU die mounted on a HD4550 PCB to make it smaller and more efficient at the cost of a dreadful 64bit memory bus). It is not known if the HD550v is 40nm (like any HD5**0) or 55nm (like the old HD46*0 series), nor whether it has 5 SIMD clusters (like the HD55*0 series) or just four (like the HD46*0 series) which combined with the low clock rate could really hurt performance.

    Hell, f-all is known about the GPU whatsoever :eek:

    In theory it would be much faster than the HD5470, but it sounds like its badly bottlenecked by cack memory bandwidth and if it really is an old 55nm part it will be needlessly hungry and lacking some of the more recent additions to the multimedia featureset, although AFAIK the HD54*0 (and all bottom-rung AMD GPUs) only have the playback acceleration - the encoding acceleration is saved for the HD46*0/HD55*0 and higher. Again, no idea if the HD550v would have it, although as its based on the third-tier GPUs above I certainly suspect it would!


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    #3
    Solitaire
    Moderators, Technology & Internet Moderators Posts: 18,377 Mod ✭✭✭✭Solitaire


    Update - Found the specs but still no reviews. Its literally a cheaper, low-power, (heavily) downclocked HD4650. Full 128-bit memory bus (yay!). 55nm (bulky and thirsty but cheap to produce compared to the current 40nm process) and has 320 shaders (HD46*0) instead of 400 (HD56*0) but even with this crippled configuration it murders nVidia's "mid-range" mobile GPUs :D

    Suffice to say it kills the (much more power-efficient) HD5470 deader than dead :o:p


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