Author: Sune Larsson
Date: 22:21:01 12/27/05
Go up one level in this thread
On December 28, 2005 at 00:55:19, Dann Corbit wrote: >On December 28, 2005 at 00:36:53, Juan Pablo Naar C. wrote: > >>Zappa is running at 128 cpu 1.6ghz itanium2 >>Hydra is running at 64 cpu 3.2ghz xeon >> >>calculating by ghz, they are running at the same speed! or am i just plain >>wrong?? > >You are just plain wrong. > >The Xeon CPUs on Hydra are almost irrelevant. The real horsepower is in the >custom chess circuits. The Xeons are just message passers, for the most part. >The bulk of the computation is happening in custom integrated circuits that do >things like "Nxe4+" instead of "mov EAX, 0xDEADBEEF". > >I seem to recall that Hydra does about 200M NPS. > >I guess that Zappa might get up to 80M NPS on that configuration. So, very >likely the NPS of Zappa might come to within a significant portion of Hydra (but >not due to the Xeon chips, really). > >But the NPS is not important anyway. > >I can look at a trillion wrong nodes in a second and not make decisions that are >any better than looking at a few better nodes. > >With chess engines, like many other things, "The proof of the pudding is in the >eating." Yes, if you don't get the position - a massive speedup just mean that you still don't get it - but a lot faster... /S
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.