Author: Tom Kerrigan
Date: 14:26:56 08/20/04
Go up one level in this thread
On August 20, 2004 at 14:53:37, Ernst Walet wrote: >On August 20, 2004 at 12:00:38, Tom Kerrigan wrote: > >>On August 20, 2004 at 07:26:28, martin fierz wrote: >> >>>On August 20, 2004 at 04:33:07, Tom Kerrigan wrote: >>> >>>>Now that AMD is selling two processors that are identical other than L2 cache >>>>size (Sempron has 256k, Athlon 64 has 512k) we have proof of Crafty's working >>>>set size: >>>> >>>>Sempron: 1,080,020 NPS >>>>Athlon 64: 1,080,230 NPS >>>> >>>>http://www.anandtech.com/linux/showdoc.aspx?i=2170&p=3 >>>> >>>>This should prove once and for all that Crafty's working set is < 256k and >>>>therefore that size of L2 cache has no effect on its performance (as long as >>>>it's >= 256k) and that main memory speed likely plays a trivial role >>>>performance-wise. >>>> >>>>I bring this up because of all of the long debates that have occurred in the >>>>past about the value of L2 cache, the speed of memory, and the working set size >>>>of chess programs. >>>> >>>>I have no doubt that Crafty uses a bunch of memory, but obviously not with >>>>enough temporal locality for it to matter one iota. >>>> >>>>-Tom >>> >>>if i read this right, then the sempron 3100+ would be a very good choice for a >>>(computer-chess-)power hungry user on a tight budget. correct or not? is there >>>anything better out there price/performancewise right now? >> >>That would be a pretty darn tight budget. The price difference between a Sempron >>3100+ and an Athlon 64 2800+ is only $20. They run at the same clock speed but >>the A64 has twice the cache and 64-bit mode, which are fairly unimportant for >>computer chess but useful features to have in general. >> >>You could save yourself a bunch of money by getting a Duron and a Socket A >>motherboard instead of a Sempron 3100+ and a socket 754 motherboard. >> >>1.8GHz Duron: $49 >>MSI Socket A motherboard: $48 >> >>Sempron 3100+: $128 >>MSI Socket 754 motherboard: $83 >> >>($114 difference) >> >>-Tom > >What I don't get is that this Sempron has a rating of 3100+ and this A64 2800+. >I would expect the other way around.... The Sempron #s are intended to be compared against Celeron MHz. The A64 numbers are vs. Pentium 4s (unoffically). -Tom
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