Re: Is AMD Athlon64 FX the way to go?
From: Chris Carlen (crcarle_at_BOGUS.sandia.gov)
Date: Wed, 10 Mar 2004 07:28:07 -0800
General Schvantzkoph wrote:
> The AthlonFX is an Opteron 1xx. So any Athlon FX board will work with an
> Opteron 1xx. The AthlonFX is the highest speed version of the Opteron and
> is priced accordingly. You are much better off picking an Opteron 144
> (1.8Ghz, $209) or an Opteron 146 (2Ghz, $280) rather than the Athlon FX
> (2.2Hz, $732). For the price of an Athlon FX you can build a dual Opteron
> 240 or 244 system and that will me much faster than a single AthlonFX.
> Clock for clock Opterons are almost twice as fast as Xeons, more so in
> multiprocessor systems. There are a couple of reasons for this, 1) the
> pipeline in an Opteron is much shorter than it is in the P4 and 2)
> Opteron's have on chip memory controllers which reduces the latency of RAM
> accesses. In multiprocessor systems (which you won't be build on you
> budget) the system memory bandwidth is much higher because each processor
> has it's own memory controller while Xeon systems share a single memory
> The big difference between AthlonFX/Opteron 1xx and the Athlon64 is memory
> bandwidth, the Opteron has twice the bandwidth of the Athlon 64. Also
> Opterons support more RAM than Athlon64s, 4 DIMMs as opposed to 3. Finally
> Opterons support ECC, Athlon 64s don't.
Dear Gen. Schvantzkoph: :-D
Thanks for the input!
-- ____________________________________ Christopher R. Carlen Principal Laser/Optical Technologist Sandia National Laboratories CA USA email@example.com