[Beowulf] Shanghai vs Barcelona, Shanghai vs Nehalem
hahn at mcmaster.ca
Wed Oct 22 13:23:08 EDT 2008
>> Are there some informal comparisons of Shanghai vs Nehalem?
> I beleive that Shanghai performance increase in comparison w/Barcelona will
> be practically defined only by possible higher Shanghai frequencies.
is that based on anything hands-on?
IMO, AMD needs to get a bit more serious about competing. if I7
ships with ~15 GB/s per socket and working multi-socket scalability,
it's hard to imagine why anyone would bother to look at AMD. either:
- there is some sort of significant flaw with I7 (runs like a
dog in 64b mode or Hf turns into blue cheese after a year, etc).
- AMD gets its act together (lower-latency L3, highly efficient
ddr3/1333 interface, directory-based coherence).
- AMD satisfies itself with bottom-feeding (which probably
also means only low-end consumer stuff with little HPC interest).
I've had good reason to be an AMD fan in recent-ish years, but if Intel
is firing on all cylinders, AMD needs to be the rotary engine or have more
cylinders, or something...
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