[Tfug] AMD vs. Intel floating point

[Harry McGregor]

John,

If you want access to a Dual AMD system (AMD 2000+), the parts will be
arriving shortly for a new server at Corbett, and we won't be installing
until TUSD's spring break.

As far as raw FPU, with strong memory, I would wait another 15-18 days,
Hammer will be out then (Sorry, Opteron), and orders can be filled by
the end of the month...

		Harry

On Sun, 2003-03-30 at 17:46, Brian Murphy wrote:
> Quoting John Gruenenfelder <johng@bach.as.arizona.edu>:
> > I am trying to put together an upgrade for a machine at work.  Our
> > primary concern is number crunching power, especially floating point
> (lots of
> > FFTs much of the time).  A number of place I have read show benchmarks
> > with AMD chips ahead of Intel chips in FPU performance, but finding *good*
> > benchmarks is very hard.
> > 
> > In particular, the machine is a choice between 2x Athlon MP 2600 (the
> > 2700s not being available yet) or 2x Pentium 4 3Ghz.  There is, of course,
> > a pretty big price difference too, but more important is FPU speed.
> > 
> > Does anybody have any good links to benchmarks either way?  Any
> > experience in which is better?
> > 
> 
> Of course the best solution is to test your code on both.  You may see
> things like CPU cache play a giant role depending on your program.
> 
> The SPEC tests are often cited benchmarks.  See
> http://www.spec.org/cpu2000/results/ .  There is a 2600+MP Athlon in the
> 1st Q 2003 results and a bunch of P4s and Xeons in 4thQ 2002.
> 
> In short, the P4s look faster.
> (I hope this table formats okay)
> 
> CFP2000 Rates
> Company  System                                                        
>                          CPUs  Base Peak
> AMD  Asus A7M266-D Motherboard, AMD Athlon (TM) MP 2400+    2  10.5  11.2
> AMD  MSI K7D Master Motherboard, AMD Athlon (TM) MP 2600+   2  10.4  11.0
> Dell     PowerEdge 6650 (2.0 GHz Xeon MP)                              
>              2  13.2  13.8
> Dell     Precision WorkStation 530 (2.4 GHz Xeon)                      
>            2  13.5  13.8
> 
> The AMD benchmarks also show how important a good motherboard is.
> 
> Brian
> 
> The opinions or statements expressed herein are my own and should not be
> taken as a position, opinion, or endorsement of the University of Arizona.
> 
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