Raw CPU power...help !

[stuntman]

Hello to you all once again !
This may seem kinda odd but i want to be build configuration limited by
this spec :

1. WinXp as running OS
2. Single core CPU 32bit

Let me expain bit more. I'am using program (can't tell which) that was out
in 2001. System requirements allowed it to run on 98SE/NT/XP. As it took
years to complete it, i belive it was written to work on win98. Program was
tested and is working on XP and W7. Running on modern multi core/HT and
all other cpus it is using only one core.I am almost certain it does not fully
use 64 bit cpus because of release date.

This program uses CPU 100% until calculation is done. Taske manager in
performace monitr shows straigt line of 100% CPU usage all the time.
Memory is not important, it's using +/- 10Mb. Could be run or 128Mb RAM
to 2Gb, I didn't notice any change.

This is what I tested :
Pentium M765 (400Mhz FSB ) on 852GM + 2Gb DDR1 : time 750seconds
1.4S Tualatin (133Mhz FSB) on VIA133A+1,5Gb PC13: time 1480sec
Some 2700 AMD (800Mhz fsb) AM2 socket i guess.....: time 668 seconds

I didn't measure the time, program has bulit in clock that tells you how
long it's running.It starts when you click start and ends when all results
are fnished. All automated. I assume CPU cache doesn't play any role in
lenght of calculations.

Last serious calculation i run was approx 50hours long. My laptop with
M765 inside after 50h was like oven.

So, my question is this : what cpu and board would you recomend for
such job? From what I saw, memory bandwith doesn't matter nor does
CPU cache..? Reading last few days about P4 CPUs all I can say is that
Northwood with 800FSB at 3,4Ghz is about the same as Prescott at
3,8Ghz. Is it due to longer pipeline? Assuming thats true are they any
or non faster than my current M765 at 2,13Ghz? As Pentium M has even
shorter pipelines/it's true P6 bla bla....I'm sure Gallatin 3,4Ghz EE would
be faster than my cpu, but how much? 5%?30%? This thoughts aside,
I'd like to hear other opinions.

Thank you !

[mavroxur]

You say that you want to run a single-threaded 32 bit app as fast as possible? Well, I don't see a limitation that would prevent you from running the fastest possible chip out there and running Win XP 32bit on it. You could technically run an i7-3970x and run Win XP on it, and even though your app is single threaded, it would run screamingly fast. Are you wanting to build a system from scratch or upgrade an existing system? You left out a lot of details for your request.

[stuntman]

[kosmokrator]

First of All u dont tell uS THE PROGRAM U USE.
its a military secret Software?

I think u try to compare some old 32 bit cpus with some heavy bench tool ?
this is your point? or what?

[stuntman]

[hardwarecop]

The fastest Intel whatever CPU, 4960X(?) remains the fastest, even on single threaded workload. It will surely reach the maximum if your program takes the advantage of more than one thread. Otherwise you'll reach a maximum of 8,3% CPU load with that program if you use this 4960X CPU (6 Cores + 12 Threads). This is still much faster (and efficient ) than a P4 that has a workload of 100% especially if you compare the both processor architectures (Ivy Bridge vs NetBurst). It bet that even a Core 2 Duo can easily outperform any P4 while it reaches 50% total workload, (@1 core 100% load running that program)

Or did I misunderstood you or explained it bad??

[kosmokrator]

[gshv]

[stuntman]

[stuntman]

[stuntman]

[stuntman]

Maybe i solved it. Comparing SuperPi 1M scores i figured
out core2duo as best option. It is 64bit but it's something
affordable.