[Beowulf] GPU (was Accelerator) for data compressing

Bruno Coutinho coutinho at dcc.ufmg.br
Sat Oct 4 15:26:48 PDT 2008


2008/10/4 Ellis Wilson <xclski at yahoo.com>

> Bruno Coutinho wrote:
> > You need to get data from machine main memory, compress and send results
> > back several times.
> > The bandwidth of pci express today is 8GB/s, so this is the maximum data
> > rate a gpu can compress.
> > You can use some tricks like computation and i/o (to main memory)
> > parallelization, but will be constrained to 8GB/s anyway.
>
> Check out PCI Express 2 then, you'll get 16GB/s bandwidth but I'm not
> sure all the GPU's are moved that direction yet.
>

This is in a x32 slot (that I never saw) in a typical x16 slot pci-e 1.0
make 4GB/s and 2.0 makes 8GB/s.

All nvidia cards from 9 series and ATI from 3xxx series have pci express
2.0.

In chipsets only the newest ones like intel P45 have pci-e 2.0.
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