By: David Kanter (dkanter.delete@this.realworldtech.com), July 25, 2012 4:06 pm
Room: Moderated Discussions
Michael S (already5chosen.delete@this.yahoo.com) on July 25, 2012 2:45 pm wrote:
> David Kanter (dkanter.delete@this.realworldtech.com) on July 25, 2012 1:37 am
> wrote:
> > New computational efficiency data shows GPUs with a clear edge over
> CPUs, but
> > the gap is narrowing as CPUs adopt wide vectors (e.g. AVX).
> Surprisingly, a
> > throughput CPU is the most energy efficient processor,
> offering hope for future
> > architectures. Our data also shows some
> advantages of AMD's Bulldozer, and the
> > overhead associated with highly
> scalable server CPUs.
> >
> > Comments and feedback
> > welcome!
> >
>
> > David
>
> I wonder, what Silverthorn SKU is represented by the point in
> Chart 1?
>
> Looking at SKUs that were available in 2009, the best perf/mm^2
> belongs to Z550:
>
> 2.0 GHz * 1.5 FLOPs/Hz / 26 mm^2 = 0.115 DP
> GFLOP/(s*mm^2)
> But it has much lower per watt score than indicated on the
> graph:
> 2.0 GHz * 1.5 FLOPs/Hz / 2.4W = 1.25 DP GFLOP/J
>
> The best performance
> per Watt, on the other hand, belongs to Z500 (ULV part).
> 0.8 GHz * 1.5 FLOPs/Hz
> / 0.65W = 1.85 DP GFLOP/J
> But it does not shine in perf/mm^2 metric.
> 0.8 GHz *
> 1.5 FLOPs/Hz / 26 mm^2 = 0.046 DP GFLOP/(s*mm^2)
>
> So, neither of the two
> Silverthorn corners is close to the point on your graph.
I think I was using the Z550 or Z540; however, I suspect that I was using 2 DP FLOP/clock.
The chart is from the older article and hasn't been updated.
David
> David Kanter (dkanter.delete@this.realworldtech.com) on July 25, 2012 1:37 am
> wrote:
> > New computational efficiency data shows GPUs with a clear edge over
> CPUs, but
> > the gap is narrowing as CPUs adopt wide vectors (e.g. AVX).
> Surprisingly, a
> > throughput CPU is the most energy efficient processor,
> offering hope for future
> > architectures. Our data also shows some
> advantages of AMD's Bulldozer, and the
> > overhead associated with highly
> scalable server CPUs.
> >
> > Comments and feedback
> > welcome!
> >
>
> > David
>
> I wonder, what Silverthorn SKU is represented by the point in
> Chart 1?
>
> Looking at SKUs that were available in 2009, the best perf/mm^2
> belongs to Z550:
>
> 2.0 GHz * 1.5 FLOPs/Hz / 26 mm^2 = 0.115 DP
> GFLOP/(s*mm^2)
> But it has much lower per watt score than indicated on the
> graph:
> 2.0 GHz * 1.5 FLOPs/Hz / 2.4W = 1.25 DP GFLOP/J
>
> The best performance
> per Watt, on the other hand, belongs to Z500 (ULV part).
> 0.8 GHz * 1.5 FLOPs/Hz
> / 0.65W = 1.85 DP GFLOP/J
> But it does not shine in perf/mm^2 metric.
> 0.8 GHz *
> 1.5 FLOPs/Hz / 26 mm^2 = 0.046 DP GFLOP/(s*mm^2)
>
> So, neither of the two
> Silverthorn corners is close to the point on your graph.
I think I was using the Z550 or Z540; however, I suspect that I was using 2 DP FLOP/clock.
The chart is from the older article and hasn't been updated.
David
