what does the 64bit version get me?

crash893 · 2010-03-25, 03:24

Is there any advantage to running the 64bit version?

I've heard that it makes integer based programs run faster but I know that prime95 is a oddball in the sense that it uses very precise numbers

I assume that like unlike gpu computing it must do something or George wouldn't have made a 64bit version.

(windows 7 pro 64bit)

Robert_47 · 2010-03-25, 04:12

The 64 bit version is about twice as fast at trial factoring. As of version 25.9, it can also be about 10% faster on other work depending on the CPU.

petrw1 · 2010-03-25, 04:36

http://www.mersenneforum.org/showthread.php?t=11602

joblack · 2010-03-25, 09:58

Quote:

Originally Posted by crash893

Is there any advantage to running the 64bit version?

I've heard that it makes integer based programs run faster but I know that prime95 is a oddball in the sense that it uses very precise numbers

I assume that like unlike gpu computing it must do something or George wouldn't have made a 64bit version.

(windows 7 pro 64bit)

It uses additional 8 SSE registers from the 64 bit cpu register sets.

2010-03-25, 03:24	#1
crash893 Sep 2002 2³·37 Posts	what does the 64bit version get me? Is there any advantage to running the 64bit version? I've heard that it makes integer based programs run faster but I know that prime95 is a oddball in the sense that it uses very precise numbers I assume that like unlike gpu computing it must do something or George wouldn't have made a 64bit version. (windows 7 pro 64bit)

2010-03-25, 04:36	#3
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 2²·7·167 Posts	Some details here.... http://www.mersenneforum.org/showthread.php?t=11602

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2010-03-25, 04:12	#2
Robert_47 Mar 2009 26₈ Posts	The 64 bit version is about twice as fast at trial factoring. As of version 25.9, it can also be about 10% faster on other work depending on the CPU.