mersenneforum.org  

Go Back   mersenneforum.org > New To GIMPS? Start Here! > Information & Answers

Reply
 
Thread Tools
Old 2011-08-19, 21:35   #1
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

2×3×13×83 Posts
Default Embarrassing question

I run a Celeron 440 2GHz, and it manages a predictable 2 GHzdays/day.

I assume it's 32-bit, but information seems remarkably hard to
come by :(

Any enlightenment welcome!

David
davieddy is offline   Reply With Quote
Old 2011-08-19, 21:46   #2
science_man_88
 
science_man_88's Avatar
 
"Forget I exist"
Jul 2009
Dumbassville

26·131 Posts
Default

Quote:
Originally Posted by davieddy View Post
I run a Celeron 440 2GHz, and it manages a predictable 2 GHzdays/day.

I assume it's 32-bit, but information seems remarkably hard to
come by :(

Any enlightenment welcome!

David
http://www.intel.com/design/intarch/...n440/index.htm
science_man_88 is offline   Reply With Quote
Old 2011-08-19, 21:50   #3
science_man_88
 
science_man_88's Avatar
 
"Forget I exist"
Jul 2009
Dumbassville

20C016 Posts
Default

Quote:
Originally Posted by science_man_88 View Post
if that's the correct one:

Quote:
Intel® 64 ArchitectureΦ (Intel® 64) Enables access to larger amounts of memory and provides flexibility for 32-bit and 64-bit applications.
science_man_88 is offline   Reply With Quote
Old 2011-08-19, 21:53   #4
Christenson
 
Christenson's Avatar
 
Dec 2010
Monticello

179510 Posts
Default

If your OS doesn't say "64 bit", it isn't running in 64 bit mode, even if the processor supports it.
Christenson is offline   Reply With Quote
Old 2011-08-19, 21:54   #5
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

2×3×13×83 Posts
Default

Quote:
Originally Posted by science_man_88 View Post
Many thanks.
Unfortunately that article is as ambiguous as it could be viz a viz
my 32/64 bit question!

David
davieddy is offline   Reply With Quote
Old 2011-08-19, 22:02   #6
science_man_88
 
science_man_88's Avatar
 
"Forget I exist"
Jul 2009
Dumbassville

26·131 Posts
Default

Quote:
Originally Posted by davieddy View Post
Many thanks.
Unfortunately that article is as ambiguous as it could be viz a viz
my 32/64 bit question!

David
well according to what Christenson said the easiest way to tell would be to check OS information if it's running a 64 bit OS it's in 64 bit mode and supposedly could support 64 bit applications otherwise , it's 32 bit in windows system information will tell you the bits the OS is.
okay maybe not lol I can't remember what it's called lol.

Last fiddled with by science_man_88 on 2011-08-19 at 22:03
science_man_88 is offline   Reply With Quote
Old 2011-08-19, 22:08   #7
science_man_88
 
science_man_88's Avatar
 
"Forget I exist"
Jul 2009
Dumbassville

26×131 Posts
Default

Quote:
Originally Posted by science_man_88 View Post
well according to what Christenson said the easiest way to tell would be to check OS information if it's running a 64 bit OS it's in 64 bit mode and supposedly could support 64 bit applications otherwise , it's 32 bit in windows system information will tell you the bits the OS is.
okay maybe not lol I can't remember what it's called lol.
Control Panel\System and Security\System in windows
science_man_88 is offline   Reply With Quote
Old 2011-08-19, 22:16   #8
Mini-Geek
Account Deleted
 
Mini-Geek's Avatar
 
"Tim Sorbera"
Aug 2006
San Antonio, TX USA

22·11·97 Posts
Default

Quote:
Originally Posted by science_man_88 View Post
well according to what Christenson said the easiest way to tell would be to check OS information if it's running a 64 bit OS it's in 64 bit mode and supposedly could support 64 bit applications otherwise , it's 32 bit in windows system information will tell you the bits the OS is.
okay maybe not lol I can't remember what it's called lol.
If you want to know whether you are currently running 64-bit, yes, this is the easiest way. If you want to know whether the CPU is 64-bit capable, you'll need to look elsewhere.

This article shows several methods for finding this info. Edit: I have Windows XP Pro 32-bit running with a 64-bit capable CPU. The only one of those methods that properly lets me know that my CPU is 64-bit capable is CPU-Z.

Last fiddled with by Mini-Geek on 2011-08-19 at 22:22
Mini-Geek is offline   Reply With Quote
Old 2011-08-19, 22:16   #9
davieddy
 
davieddy's Avatar
 
"Lucan"
Dec 2006
England

194A16 Posts
Default

Quote:
Originally Posted by Christenson View Post
If your OS doesn't say "64 bit", it isn't running in 64 bit mode, even if the processor supports it.
OS is Windoze XP professional, and it doesn't shout 64 at me.

The reason I feel embarrassed is because 20 years ago, I could
routinely enter or exit "protected mode" on the 386/486. (Saved time
when working in 32 bit as opposed to 16 bit because of prefix bytes)_

I have just downloaded v26.6 32 bit. How much is gained with 64 bits?

David

Come to think of it, does P95 actually give a FF about the OS
when it's working, if the processor can do 64 bits?

Last fiddled with by davieddy on 2011-08-19 at 22:25
davieddy is offline   Reply With Quote
Old 2011-08-19, 22:26   #10
science_man_88
 
science_man_88's Avatar
 
"Forget I exist"
Jul 2009
Dumbassville

26×131 Posts
Default

Quote:
Originally Posted by Mini-Geek View Post
If you want to know whether you are currently running 64-bit, yes, this is the easiest way. If you want to know whether the CPU is 64-bit capable, you'll need to look elsewhere.

This article shows several methods for finding this info. Edit: I have Windows XP Pro 32-bit running with a 64-bit capable CPU. The only one of those methods that properly lets me know that my CPU is 64-bit capable is CPU-Z.
apparently mine is 64 bit capable weird lol
science_man_88 is offline   Reply With Quote
Old 2011-08-19, 22:29   #11
Mini-Geek
Account Deleted
 
Mini-Geek's Avatar
 
"Tim Sorbera"
Aug 2006
San Antonio, TX USA

10AC16 Posts
Default

Quote:
Originally Posted by davieddy View Post
I have just downloaded v26.6 32 bit. How much is gained with 64 bits?
As far as I know, TF is significantly faster, (~5%-30%, http://mersenne-aries.sili.net/throughput.php has 32-bit and 64-bit TF listed separately and compared when possible) and FFTs (LL, P-1, and ECM) are slightly faster (~0%-5%).
Quote:
Originally Posted by davieddy View Post
Come to think of it, does P95 actually give a FF about the OS
when it's working, if the processor can do 64 bits?
Yes, it matters. If you're on a 32-bit OS, you can't run the 64-bit version, and you won't get the speedup (and no, running a 64-bit OS in a VM doesn't help either). If you think the speedup will be worth the effort, you could always switch to a 64-bit OS (Linux is free).
Mini-Geek is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why is farting embarrassing for you? jasong jasong 1 2010-10-09 03:45
embarrassing layman questions on ECM windows diep GMP-ECM 8 2010-07-29 20:57

All times are UTC. The time now is 15:18.


Thu Oct 21 15:18:18 UTC 2021 up 90 days, 9:47, 1 user, load averages: 1.08, 1.06, 1.14

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.