AMD CPU beat Intel Xeon for Numerical Application

[saveyourtime]

I got to do something to kill time, so I installed g77 on my AMD 1800 + 512DDR2600 + win2000. I had no intention to use g77 on my computer, but just want to see how fast is my computer. I compiled my code using g77 -O3 on four computers and timed the code. Here is the result.

AMD 1800 + 512DDR2600 + win2000 : 3min30sec
DUal AMD MP 1700 + 1028DDR2600 + RedHat7.1: 177sec
Dual PIII Xeon 2.0G + 512PC800 + RedHat7.3 : 4min38sec
Dual PIII 800M + 512PC800 + RedHat7.3: 5min35sec

The code uses only 2.6M memory on my win2000, so I don't think memory is a big factor. I have no idea why AMD MP 1700 is faster than AMD 1800 except that the operating systems are different.

It seems that AMD MP is a good choice for building big clusters.

 

[AndyHui]

P3 XEON at 2GHz?

P3 XEON at 800MHz with RDRAM???

Are you sure?

 

[saveyourtime]

I am 100% sure. They were top of line DELL workstation when we bought them.

 

[ChampionAtTufshop]

is the 1700mp a dual system?

amd mp is a good choice for builing clusters because axp doesnt "officially" support smp

 

[saveyourtime]

Originally posted by: ChampionAtTufshop
is the 1700mp a dual system?

amd mp is a good choice for builing clusters because axp doesnt "officially" support smp

Yes. The MP1700 is in an 100CPU cluster at University of Toronto. But I compiled it with just "g77 -O3". So it was running on one CPU.

 

[mechBgon]

I'm not putting down the great AMD result, but the fastest PentiumIII Xeon ever made by Intel was the 1000EB, as you can see from Sandpile.org as well as Intel's S-Spec charts. The Xeon proper, built on the Pentium4 core, is available at 2.0GHz.

 

[AndyHui]

Originally posted by: saveyourtime
I am 100% sure. They were top of line DELL workstation when we bought them.

No Pentium III exists at 2.0GHz. Neither as a desktop processor nor as a XEON.

No Slot 2 Pentium III chipset supports RDRAM. The i840 chipset does not support Slot 2 processors.

 

[saveyourtime]

Originally posted by: AndyHui

Originally posted by: saveyourtime
I am 100% sure. They were top of line DELL workstation when we bought them.

No Pentium III exists at 2.0GHz. Neither as a desktop processor nor as a XEON.

No Slot 2 Pentium III chipset supports RDRAM. The i840 chipset does not support Slot 2 processors.

It was really a surprise when we ( My boss and I) ordered the dual PIII800M workstation which has RDRAM on it. The configurations were clearly listed on the dell web site, and I remember there was no SDRAM option for this system. Later when I tried to find which mother board was in the workstation, I too, found that there wasn't any mother surporting dual CPU and RDRAM. This computer cost us $3600, when P4 1.7G wa already available. So, I think dell must make it.

I don't know what's the difference between PIII XEON and XEON. Since PIV doesn't support smp, I assume XEON's are PIII XEON. And my PGI compiler sees the XEON as PIII, even cpuinfo shows XEON only.

Does any one want to time the code and put the result here? It is really easy to compile. By the way, if you have linux running on AMD, I think g77 is installed by default. Then we can compare how much difference is made from win2000 and Linux.

 

[AndyHui]

The XEON with no prefix is a Pentium 4 based core. Without further information, it could be either a Foster or a Prestonia.

Are you sure that dual P3 system is a P3 XEON?

 

[saveyourtime]

Sorry, I checked again. The cpuinfo shows dual Pentium III (Coppermine). So it is not PIII XEON. I thought they were XOENs.