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

[Craig Tierney]

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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-- 
Craig Tierney (craig.tierney at noaa.gov)