[Beowulf] Nvidia, cuda, tesla and... where's my double floating point?

John Leidel john.leidel at gmail.com
Mon Jun 16 11:56:41 EDT 2008


Another article on the same card posted here: 
http://www.pcper.com/article.php?aid=578

On Mon, 2008-06-16 at 09:44 -0600, Craig Tierney wrote:
> Mark Hahn wrote:
> >> It is a bit weird if you claim to be NDA bound, whereas the news has 
> >> it in
> >> big capitals what the new IBM CELL can deliver.
> > 
> > I thought he was referring to double-precision on Nvidia gpus,
> > which have indeed not been shipped publicly (afaik).
> 
> An article posted today about the GTX280, which is to be release tomorrow,
> states that the GTX280 has "support for the IEEE-754R double-precision
> floating-point standard."
> 
> http://www.maximumpc.com/sites/maximumpc.com/themes/maximumpc/wow.php?back=article/unveiled_nvidias_next_gen_gpu
> 
> Craig
> 
> 
> > 
> >> So a very reasonable question to ask is what the latency is from the 
> >> stream processors to the device RAM.
> > 
> > sure, they're GPUs, not general-purpose coprocessors.  but both AMD and 
> > Intel are making noises about changing this.  AMD seems to be moving GPU 
> > units on-chip, where they would presumably share L3, cache coherency,
> > etc.  Intel's Larrabee approach seems to be to add wider vector units to 
> > normal x86 cores (and more of them).  I personally think the latter is 
> > much more promising from an HPC perspective.  but then again, both AMD
> > and Nvidia have major cred on the line - they have to deliver competitive
> > levels of the traditional GPU programming model.
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> > 
> 
> 

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