Author: Wayne Lowrance
Date: 11:21:47 02/19/03
Go up one level in this thread
On February 19, 2003 at 12:58:10, Robert Hyatt wrote: >On February 19, 2003 at 11:31:49, Wayne Lowrance wrote: > >>On February 19, 2003 at 00:19:41, Robert Hyatt wrote: >> >>>On February 19, 2003 at 00:11:08, Aaron Gordon wrote: >>> >>>>I just downloaded Crafty 16.19 and ran a bench for you guys. No single cpu Intel >>>>box could ever touch this without sub-zero cooling. Just plain not going to >>>>happen. >>>> >>>>Crafty v16.19 >>>> >>>>White(1): bench >>>>Running benchmark. . . >>>>...... >>>>Total nodes: 67136136 >>>>Raw nodes per second: 1766740 >>>>Total elapsed time: 38 >>>>SMP time-to-ply measurement: 16.842105 >>> >>> >>>This is not a great test since that is a very old version. I'm not sure how >>>1.7M compares to version 19.3 in nps... >>> >>>However, while on the question, what is an XP 2.44ghz machine, since I am not >>>an AMD expert. Overclocked? If so, I consider that a worthless number, because >>>of obvious reasons... >> >>Just wondering Bob, why do you feel that way ? stability ?, ask to find out if >>his overclocking is rock solid. I would be interested too. If not then I agree >>it is worthless. > > >Yes, stability. The problem is that something can _appear_ to be rock solid, >but not be. > >For example, suppose an integer add is done wrong, once every one billion times? > My >hash collision experiment suggests that this might not be noticable at all, yet >the machine >is _still_ producing wrong answers from time to time. And logic says that this >will >eventually "come home to roost". > >Think about AMD. They are competing with Intel. Why would they sell a >processor >to run at XXXX mhz, when it is capable of running at XXXX+N mhz? The answer is >that they would not. They would rather run faster and increase their >performance edge >over their competitor. But the engineers have found that XXXX works in 100% of >the >cases, where anything greater slowly increases the chance for errors. > >Overclocking is like juggling hand grenades with loose pins. Eventually >something bad >is going to happen, although it might take a long time. > >When you overclock, you reduce the ability of the processor to operate correctly >if there >is any variance in the supply voltage, any variance in the temperature, any >variance in the >outside EMF interference, etc. Okey dokie, satisfactory explanation and I cannot disagree with it. Being a EE engineer in the field of analag and digital design (long since retired)I am well aware of "worse worse case parametric values" such as you have mentioned... Thanks Wayne
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