Decoupling capacitors on GPUs

Article: Adaptive Clocking in AMD's Steamroller
By: Gabriele Svelto (gabriele.svelto.delete@this.gmail.com), May 8, 2014 9:24 am
Room: Moderated Discussions
I found the article quite interesting and it got me thinking about the potential impact this might have on GPUs and made me remind about one datapoint we have on this topic.

Back in the RV7xx days when AMD introduced the RV790 XT (aka Radeon HD 4890) they added a large ring of decoupling capacitors to the existing RV770 XT design to boost its maximum clock speed. The RV770 was originally released at 750MHz and the RV790 started at 850MHz but was widely available in overclocked configurations up to 1GHz. Interestingly the die-size increased significantly from 256 mm² to 282 mm², a >10% increase.

While those chips are now relatively old and the techniques used in GPU design might have improved, they still give us an idea of how much benefit could be reaped by getting rid of decoupling capacitors. Current high-end GPUs sport both higher power consumption and larger dies than the RV7xx family so the benefits might be very tangible.
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TopicPosted ByDate
New article: Adaptive Clocking in AMD’s SteamrollerDavid Kanter2014/05/06 01:33 PM
  New article: Adaptive Clocking in AMD’s Steamrolleritsmydamnation2014/05/06 11:12 PM
  New article: Adaptive Clocking in AMD’s SteamrollerXi Yang2014/05/07 12:08 AM
  Decoupling capacitors on GPUsGabriele Svelto2014/05/08 09:24 AM
    Decoupling capacitors on GPUsBen2014/08/27 11:56 PM
  New article: Adaptive Clocking in AMD’s SteamrollerPoindexter2014/05/10 06:06 PM
  New article: Adaptive Clocking in AMD’s SteamrollerRob Thorpe2014/05/12 05:42 AM
    New article: Adaptive Clocking in AMD’s SteamrollerDavid Hess2014/05/12 10:02 AM
      New article: Adaptive Clocking in AMD’s SteamrollerRob Thorpe2014/05/12 10:46 AM
    New article: Adaptive Clocking in AMD’s SteamrollerRicardo B2014/05/13 03:15 AM
      New article: Adaptive Clocking in AMD’s SteamrollerRob Thorpe2014/05/13 06:30 AM
    Multiple PLLs wouldn't work, but DLL jitter is no problemRobyn Henry2014/05/14 12:58 AM
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