[Numpy-discussion] Fwd: GPU Numpy

Rohit Garg rpg.314@gmail....
Thu Sep 10 03:58:13 CDT 2009


> Where are you getting this info from? IMO the technology of memory in
> graphics boards cannot be so different than in commercial motherboards. It
> could be a *bit* faster (at the expenses of packing less of it), but I'd say
> not as much as 4x faster (100 GB/s vs 25 GB/s of Intel i7 in sequential
> access), as you are suggesting. Maybe this is GPU cache bandwidth?

This is publicly documented. You can start off by looking at the
wikipedia stuff.

For reference,

gtx280-->141GBps-->has 1GB
ati4870-->115GBps-->has 1GB
ati5870-->153GBps (launches sept 22, 2009)-->2GB models will be there too

Next gen nv gpu's will *assuredly* have bandwidth in excess of 200 GBps.

This is *off chip memory bandwidth* from graphics memory (aka video
ram). GPU have (very small) caches but they don't reduce memory
latency.

>
> --
>
> Francesc Alted
>
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-- 
Rohit Garg

http://rpg-314.blogspot.com/

Senior Undergraduate
Department of Physics
Indian Institute of Technology
Bombay


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