Author: Vincent Diepeveen
Date: 10:11:42 06/30/04
Go up one level in this thread
On June 30, 2004 at 05:13:31, Uri Blass wrote:
>In the following table you can see that the itanium2 is better than the opteron
>inspite having less processors
>see http://www.top500.org/list/2004/06
top500.org is dependant upon 2 things
a) how many floating point operations a second each cpu can execute,
and doing it in vectors is fine for it
b) how good the interconnects & routing system is. streaming bandwidth is more
important there than random access latency.
>Itanium2 1.5 is place 9 in the list when opteron2.2 is place 10 in the list
>inspite of the fact that opteron2.2 ghz has 2560 processors against 1936
>proccesors of Itanium2.
>
>The person who I talked with him tell me that there is already Itanium2 1.6 and
>1.7 and he claims that the Itanium is new technology and the only reason to use
>the opteron and not the Itanium in the world championship is probably money.
the itanium is very slow processor for 32 bits engines.
for diep a 1.3Ghz itanium2 using a very good compiler (intel c++) using PGO gets
the same speed like a 2.0Ghz K7 gets for DIEP.
So you see that opteron is a lot faster than that.
computerchess is integer math, not floating point math by the way.
the itanium2 is only fast for floating point and even there opteron outcheaps it
as you can buy more opteron processors to do the job.
>He claims that for the same money I can get better things from AMD but the best
>that I can get if money is not a problem is from Intel.
itanium2 has many issues. like some instructions do not exist on the chip.
for example for random generator i use rotate a lot and this instruction is not
there. Result opteron is 3 times faster there.
itanium2 has no division instruction so it cannot divide with just 1 instruction
(there is some binary algorithm using 1/x though to approach divisions) and
loses therefore bits in accuracy when compared to a hardware instruction for the
same price.
>I want to know if this is really the case?
for chesssoftware the opteron is 2 times faster nearly than itanium2.
i hope you realize the price differences.
quad opteron 2.4Ghz = 14000 euro
quad itanium2 1.5Ghz = 55000 euro (last time i checked)
the quad opteron is effectively 60% faster for computerchess.
>I can add that I will not get the opteron for the world championship.
>They told me that they cannot get the opteron148 or opteron248 and the options
>that they can get for me is opteron246(1.4ghz) or Opteron142(1.6ghz)
You should order it in USA or somewhere in europe, just pay some import tax then
on the processors.
Is a lot cheaper still than ordering it in israel.
>I decided that these options are not acceptable and the AMD3000 (2.0 ghz) is
>probably better.
>Uri
for you AMD 2.2Ghz is even faster than that.
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.