GPU Crunching - Something to think about.
21 Jan 2010 11:49:04 UTC
Topic 194740
(moderation:
As of 17 Jan. 2010, Collatz volunteers are providing their project with the following:
Hosts: 10,571
GPUs: 8,923
CPUs/Cores: 36,020
GPU petaFLOPS: 7.48
CPU petaFlops: 0.092
7.48 PetaFlops !!!
Most of this power comes from the large number of Hosts
running high powered ATI cards.
Nvidia cards are wimpy by comparison.
The fastest supercomputer in the world – Oak Ridge Labs
‘Jaguar’ only manages a lousy 2.3 petaflops.
http://www.top500.org/lists/2009/11/press-release
So, I guess Collatz is actually the de facto Fastest Supercomputer
in the world :-)
Bill
GPU Crunching - Something to think about.
)
You don't give a source for your figures, but I guess they come from the Project Administrator's message 5605.
He, in turn, doesn't give details of his sources either, but he would appear to be using "peak" or "marketing" flops. The Jaguar was at least benchmarked.
BOINCstats only claims a figure of 780 TeraFLOPS: and that is derived from the BOINC credit (specifically, RAC) awarded by the project. Still an impressive figure.
But.... the Collatz Conjecture belongs in the realm of integer (whole number) mathematics, as you can see from the BOINC project's best results page. I'm not sure why the project is doing any Floating Point operations at all.
RE: You don't give a source
)
Yep, from Slicker's post. Thanks for creating that link.
Bill
RE: But.... the Collatz
)
Hi Richard, Collatz C.(3x+1) does integers only, IMHO and the numbers fit completely in the GPU's memory, mostly GDDR5.
I think, that is why those cards appear to be so fast! Hardly any traffic over the AGP/PCI_Ex16 or 8 bus(ses).
Take a look at the CPU times, mostly 0 (zero) or 0.1-0.5sec.
Got an ATI HD5770* and tried it on Collatz C.
*= single precision.