Author: Slater Wold
Date: 19:27:53 12/29/03
Go up one level in this thread
On December 29, 2003 at 18:27:42, Peter Berger wrote: >On December 29, 2003 at 11:07:02, Slater Wold wrote: > >>On December 29, 2003 at 10:48:15, Peter Berger wrote: >> >>>Hi, >>> >>>this has probably been discussed before - I wonder if it is possible to use >>>these engines in dual mode on a P4HT 3.06GHz computer and if the answer is yes, >>>what kind of speedup you can expect. >>> >>>TIA, >>>Peter >> >>Yes. 0 - 25%. > >:-). I was expecting more specific answers (many thanks also to Bob and Henrik), >but your range seems to be pretty accurate. > >As I expect that you probably own Deep Junior and Shredder too, how do the >numbers look for them? I have Shredder. Lost Junior. LOL HTing is pretty stable between programs...it's position that makes the numbers fluctuate. In any program, you'll see a 0% (and I have seen positions were HTing is no faster than using a single thread) to 25% speedup. 20% would generally be would I would bet on. >But the general answer is already given I suppose, HT really isn't very >important when it is about engine speed. SMT does not = SMP, for sure. But it still squeezes out a little juice. For what Intel calls 'free'. >I was considering to get another computer for Christmas mainly but not only for >chess purposes, but I have to find a somehow reasonable argument to do so ;). I >already own a speedy XP2600+ that I got last year - it still looks decent now, >so it seems it was a good buy. A 2600+ is still a damn good computer. >What's the cool thing to get these days ( in a reasonable prize range)? Is there >anything twice as fast as the XP2600+ already? Sorry for my ignorance - I am not >well informed when it is about hardware development. A dual 3.06Ghz would do it, but you've already seen those prices. A dual 2800+ AMD would get you about 2.5M nps in Crafty, but you'd have to build it yourself. Still a damn good buy for a lot less than 3,000 Euro. (And be >2x faster than your 2600+ in ANY SMP engine!) >My own little research came up with the Athlon 64 3200+ - but it probably is not >that much better - I remember some posts by GCP that showed it might still be >great for some chessprograms though. Look at my list from a thread a few days ago...some of these numbers are guesstimates, as Mike would say, 'you're mileage may vary'. But I think they are fairly close. These are of course Crafty numbers... Athlon 64 FX51 (2.2Ghz) = 1.64M nps Opteron 2.2Ghz = 1.64M nps Athlon 64 3200+ (2.0Ghz) = 1.50M nps P4 3.6Ghz = 1.48M nps AMD Athlon XP 3200+ (2.2Ghz) = 1.45M nps P4 3.2Ghz Extreme Edition = 1.37M nps Opteron 1.8Ghz = 1.35M nps P4 3.0Ghz = 1.23M nps
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