Author: Jeremiah Penery
Date: 14:53:59 02/28/02
Go up one level in this thread
On February 28, 2002 at 17:15:41, Terry McCracken wrote: >On February 28, 2002 at 05:39:56, Aaron Gordon wrote: > >>I know a few of you here are interested in the AMD vs Intel thing and just speed >>in general. Well, here you go. Crafty benchmarks of CPU's clocked beyond >>anything thats out currently. This should show us what we can expect in the near >>future as clock speeds ramp up even further. >> >>Just got a friend to test Crafty on his new Northwood P4-1.8A at >>2465MHz(137fsb). He's using a Pentium 4 optimized (and profiled) Crafty v18.11. >>I am using Crafty 18.11 profiled for the AthlonXP. The results were taken >>without a crafty.rc file. Here they are... >> >>Intel Pentium 4 (Northwood) 1800MHz overclocked to 2465MHz, 137fsb. >>Total nodes: 104161030 >>Raw nodes per second: 992009 >>Total elapsed time: 105 >>SMP time-to-ply measurement: 6.095238 >> >>AMD AthlonXP 1900+ 1600MHz overclocked to 1860MHz, 155fsb. >>Total nodes: 104161030 >>Raw nodes per second: 1197253 >>Total elapsed time: 87 >>SMP time-to-ply measurement: 7.356322 >> >>As you can see here... the Pentium 4 having twice the L2 and 605MHz more than >>the AthlonXP still gets beaten by over 20%. Not too shabby I figure. :) Can't >>wait for the AMD Hammer (x86-64)... > > >Intel Pentium 4 (Northwood) 1800MHz overclocked to 2465MHz, 137fsb > >I see a couple of problems here. One the "Northwood" core AFAIK is 2.2Ghz before >overclocking. You have it at 1.8Ghz? This appears to be the "Willamette" core on >a 0.18 micron process. You can buy Northwoods at 1.6, 1.8, 2.0, and 2.2 GHz. >The other problem, is the bus 137Mhz, that is _slow_ and can't be using either >DDR-SDRAM or RDRAM. P4 default bus speed is 100MHz, though it is quad-pumped to make it effectively 400MHz. >If you use RDRAM at 400Mgh with a "Northwood" core at 2.2Ghz or faster then your >results will be far higher for your Crafty Benchmark/P-4 test. I bet it would do just as well with DDR memory. RDRAM has a high latency, which is not so good for chess programs.
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