Author: Robert Hyatt
Date: 08:18:22 03/06/03
Go up one level in this thread
On March 06, 2003 at 00:19:54, Keith Evans wrote: >On March 05, 2003 at 22:41:02, Robert Hyatt wrote: > >>On March 05, 2003 at 20:10:56, Keith Evans wrote: >> >>>On March 05, 2003 at 15:09:38, Robert Hyatt wrote: >>> >>>>On March 05, 2003 at 14:46:18, Keith Evans wrote: >>>> >>>>>On March 05, 2003 at 11:34:39, Robert Hyatt wrote: >>>>> >>>>>>On March 05, 2003 at 10:21:32, Vincent Diepeveen wrote: >>>>>> >>>>>>Your data is simply wrong. The xeon core has _not_ changed from 2.8ghz to 3.06 >>>>>>ghz, >>>>>>and I have no idea why you want to supply your "disinformation" that it has. >>>>>> >>>>>>We have four of these on the way (dual 3.06 dell 650s) for faculty. They have >>>>>>shipped >>>>>>(2/28) so they should be here any time. I'll run the tests and post the results >>>>>>to further >>>>>>debunk this "myth" that 3.06's are different... >>>>>> >>>>>> >>>>> >>>>>What is the difference between a 3.06 GHz P4 and a 3.06 GHz Xeon? >>>>> >>>>>Thanks, >>>>>Keith >>>> >>>> >>>>Not a whole lot, other than the xeons have the necessary hardware for multiple >>>>processor >>>>configurations. IE the ability for each to invalidate pieces of the cache based >>>>on activity on >>>>the other processor. >>> >>>At Dell you can buy dual processor P4 systems. How are they handling the >>>multiprocessor configurations compared to a Xeon? Is there a performance >>>hit? Are they really Xeons and not P4s? >> >>What machine? We have bought several 650's and they are xeon-based. My >>2600 server platform is also xeon-based. >> >>Tell me what you are looking at and I'll poke around Dell... > >Now that I'm looking again I can't find them. Which means that it must have been >a figment of my imagination, and you're right about the multiple processor >stuff. I'm actually quite glad to be wrong about that because otherwise I would >be very confused... Sorry about that. >> >> >>> >>>>Also there are xeons and xeon-MP versions. The MP >>>>versions are >>>>supposedly the only ones capable of running in 4-way and up boxes. What the >>>>differences are >>>>I really have not taken the time to discover... >>>> >>>>Oh yes. There is one significant difference. Price. :) >>> >>>Has anyone run crafty on an MP system? Any idea how a 2 GHz MP would compare to >>>a 3 GHz Xeon? >> >> >>I have run it on a 4-way 2ghz box. It is faster than my dual 2.8, but then >>it is _way_ more expensive as well as the 2ghz xeons (MP certified) only come >>in 2mb L2 cache versions and each CPU is selling for $4K or so. Makes the >>machine _very_ expensive. > >I might be interested in such a box for running ASIC simulations so cost >wouldn't be an issue. I think that a dual MP box could be had for under $15k at >Dell which isn't bad compared to the cost of the software that I would be >running on it. The large cache might be a huge win - the 512k Xeon cache >definitely helped. > >Regards, >Keith When you say "dual MP" I assume you mean dual xeons but with huge L2? I haven't tried to check, but I would suspect it might not work. There is something in the back of my mind that the MP xeons have one extra pin, but that might be a faulty recollection. But if it is true, it would mean that you couldn't swap a couple of 2MB L2 xeons into a box like mine. I think this is mentioned somewhere on the Intel web site. I ran across it when trying to figure out what I wanted to buy when I got my dual.
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.