[Beowulf] Which is better: 32x2 or 64x1

Bruce Allen ballen at gravity.phys.uwm.edu
Fri Apr 28 07:49:44 PDT 2006

For what it's worth, the Opteron 175 (2 x 2.2 GHz cores) is identical 
silicon to the AMD64 x2 4400+. The qualification/testing process is 
apparently NOT the same for the two types of chip, and the register that 
returns 'chip ID' is programmed differently.  Other than that, I have been 
told by AMD engineers that they are identical.


On Fri, 28 Apr 2006, Leon Matthews wrote:

>>> Now I want to know which is better (performance & price)?
>>>   * 64 x Opteron Single Core
>>>   * 32 x Opteron Dual Core
> How does the performance of Dual Core Opterons compare to that of Dual Core
> Athlon64 processors?
> It is /much/ cheaper (30- 50% -- at least down here in the antipodes) to
> build a system with the later, especially when you take into account the
> price of the motherboards.
> Cheers,
> 	Leon
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