[Beowulf] DARPA issues 20 MUSD grant to nVidia to go from 1 GFLOPS/Watt to 75 GFLOPS/Watt
diep at xs4all.nl
Mon Dec 17 10:01:56 PST 2012
On Dec 17, 2012, at 6:27 PM, Lux, Jim (337C) wrote:
> That could be a notional 1 GFLOP/Watt in a fielded system.
Even linpack is 70% - 80% efficient on this so should get out oh
let's use a conservative 4.5 flops/watt effectively at codes.
Note that (to my big surprise) it seems to be the case that the gpu's
are effectively getting higher efficiency than Xeon Phi here.
> The original documents for PERFECT are probably a year or two old
> by now.. but what DARPA is looking for is a nearly 2 order of
> magnitude improvement... Whether they started at 1 or 1.4 or 6
> really doesn't make much difference to what they're looking for.
Yeah well that 2 orders of a magnitude is just 1 order of a magnitude
if we start at 6.
6 ==> 75 = factor 12
They speak about 7 nm technology in the accompanying document. That's
a very conservative estimate,
obviously in theory even with todays 2 dimensional way of building
(not to mention when things really get 3d),
we speak of a difference in theory of:
(28 / 7) ^ 2 = 4^2 = 16
Given enough time, engineers will get that factor 16 easily out of
transition over the years from 28/32 nm to 7 nm.
Note that 7nm is still far beyond the horizon.
However if they would have needed to improve current design factor 75
moving from 28/32 nm they use today to 7 nm,
that would be a complicated bet.
> In any case, it's a long way from a manufacturer's cut sheet to a
> system installed in a tank bouncing through the woods..
> Jim Lux
> -----Original Message-----
> From: beowulf-bounces at beowulf.org [mailto:beowulf-
> bounces at beowulf.org] On Behalf Of Vincent Diepeveen
> Sent: Monday, December 17, 2012 5:50 AM
> To: Eugen Leitl
> Cc: Beowulf at beowulf.org; info at postbiota.org
> Subject: Re: [Beowulf] DARPA issues 20 MUSD grant to nVidia to go
> from 1 GFLOPS/Watt to 75 GFLOPS/Watt
> "todays 1 gflop/watt" ?
> The K20X delivers 1.4 Tflop nearly.
> If i google it's 235 watt TDP.
> 1.4 Tflop / 235 = 6 gflops/watt
> On Dec 17, 2012, at 2:21 PM, Eugen Leitl wrote:
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