Author: Yen Art Tham
Date: 12:19:43 12/05/02
Go up one level in this thread
On December 05, 2002 at 10:22:31, Robert Hyatt wrote: >On December 05, 2002 at 09:41:41, Brian Katz wrote: > >>Could someone please explain the difference between the AMD Athlon >>2600+ processor and let's say multi processor 2 x 1000. >>Even if we use Pentium as examples such as 1 x 2.0 gig vs 2 x 1.0 gig. Would >>they be the same? Someone had told me that a 1x2000 is faster than a 2x1000. >> >>Please explain the difference. >> >>Thank you >> >>Brian Katz > > >First, 2 x 1000 is < 1 x 2800. :) > >But more importantly, a dual doesn't search twice as fast as a single. >Depending on who >you believe, the dual AMD will run somewhere between 1.4 and 1.7 times as fast >as a single >cpu. So that dual 1000 now looks like a single 1400 to 1700 machine. > >But you aren't home yet. A parallel search is going to be somewhere around 1.7X >efficient >rather than 2X, due to extra nodes searched, so that dual 1000 will be slower. >Let's solve >this completely: > >2 * 1000 * 1.7/2.0 * 1.7/2.0 (giving AMD the benefit of assuming the dual is >1.7x faster >overall which I have not seen from numbers posted here) and you get: > >1445mhz. Take the single cpu you mentioned. :) If your calculations are right, it doesn't look very good for the dual. Only a 45% (mhz) improvement! Doesn't look like it's worth it to own a dual.
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