Author: Yen Art Tham
Date: 17:40:00 12/05/02
Go up one level in this thread
On December 05, 2002 at 18:09:06, Robert Hyatt wrote: >On December 05, 2002 at 15:19:43, Yen Art Tham wrote: > >>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. > > >Depends, of course. I can post some dual comparison numbers for Crafty tonight >if you >want, to see what a dual xeon does. Of course it will be using hyper-threading, >but it will >at least show the dual xeon vs single xeon number in a crude way. That'll be great. Thanks. BTW, how much does your new dual xeon cost?
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