mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Hardware

Reply
 
Thread Tools
Old 2005-05-23, 01:54   #12
nomadicus
 
nomadicus's Avatar
 
Jan 2003
North Carolina

24610 Posts
Default

Quote:
Originally Posted by Joshua2
Which if your running two p95's should be just about twice as fast . . .
Should be about 1.7x to 1.8x as fast. I have a dual Xeon 2.8GHz, both CPUs running LL with affinity set, it is getting 1.6x performance.
Hopefully, someone will post the results of prime95 on a dual core in the perpetual benchmark thread.
nomadicus is offline   Reply With Quote
Old 2005-05-23, 06:40   #13
georgekh
 
georgekh's Avatar
 
Oct 2004

1101102 Posts
Default

when i said that they are out and i want to buy one i meant that in a few months i will get one because i know they are still not available here where i am and i dont mind if the chips are hot because i got a Vapochill so thats no problem :)
georgekh is offline   Reply With Quote
Old 2005-05-23, 12:47   #14
dsouza123
 
dsouza123's Avatar
 
Sep 2002

29616 Posts
Default A correction on AMD cache sizes

In my previous post listing dual core Athlon 64 and Pentium D/EE the L2 cache
size for the Athlon 64s were half of the correct value
(I mixed per core L2 cache for AMD with total L2 cache for INTEL)

It should have the following instead.

==========================================
All L2 cache values listed below are total cache.

For the Athlon 64 X2
Clock, Rating, L2 Cache, FSB
----------------Athlon 64 X2 (Manchester Socket 939)
2200 4200+ 1MB 400
2400 4600+ 1MB 400
----------------Athlon 64 X2 (Toledo Socket 939)
2200 4400+ 2MB 400
2400 4800+ 2MB 400
==========================================
dsouza123 is offline   Reply With Quote
Old 2005-08-05, 23:07   #15
JHagerson
 
JHagerson's Avatar
 
May 2005
Naperville, IL, USA

22×72 Posts
Default Using Pentium D with Prime95

Here is what I have found. To get Prime95 to use both cores of the Pentium D, the affinity for one instance needs to be set to processor 0, the other instance to processor 2.

EDIT: I take this back. I can get both instances on one core or the other. George, please tell me what I need to do! Thank you.

Last fiddled with by JHagerson on 2005-08-05 at 23:12
JHagerson is offline   Reply With Quote
Old 2005-08-06, 03:11   #16
delta_t
 
delta_t's Avatar
 
Nov 2002
Anchorage, AK

3·7·17 Posts
Default

I think you want affinity as CPU 0 and 1 (not 0 and 2).
delta_t is offline   Reply With Quote
Old 2005-08-10, 14:48   #17
Cruelty
 
Cruelty's Avatar
 
May 2005

162410 Posts
Default

Quote:
Originally Posted by JHagerson
Here is what I have found. To get Prime95 to use both cores of the Pentium D, the affinity for one instance needs to be set to processor 0, the other instance to processor 2.
If this is a Pentium D you have and not the EE (the later being HT enabled thus providing 2 physical and 2 virtual CPUs) you should only choose between CPU0 and CPU1 when setting affinity, as suggested by delta_t above.
Cruelty is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which version of Prime95 for Pentium 3? Unregistered Information & Answers 3 2007-11-03 07:56
Pentium 90 // Pentium ][ 400 years ValerieVonck Programming 4 2006-12-12 17:06
Overclocking a Pentium D 805 SORIANO Hardware 7 2006-08-20 03:34
Pentium D 930 - slow for Prime95!? rx7350 Hardware 25 2006-07-04 14:51
Best Prime95 for Pentium III Cu 866/133 Marco Software 4 2003-06-05 08:06

All times are UTC. The time now is 20:38.

Fri Mar 5 20:38:38 UTC 2021 up 92 days, 16:49, 0 users, load averages: 2.06, 2.44, 2.89

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.