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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: 64bit versus 32 bit |
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Thread Status: Active Total posts in this thread: 4
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges: 
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I am planning to renew my computer rig.
----------------------------------------At the moment I run Vista 32 on a quadcore QX9770 CPU. There are 4 cores and 4 threads. At the moment I have the classical 3GB available out of 4GB of RAM installed. I will switch when the CoreI9 from Intel will be available (6 core and 12 threads) and to Windows 7 in 64bit. To compare apples with apples, if on my actual system I would switch from Vista 32 to Vista 64, would I get a sensible performance improvement in processing? Are some projects more sensitive to a 64bit system or there is no difference. On a 64bit system I can install 12GB ram instead of my 4GB. Will this improve performance in a visible way? Any reply would be welcomed.  |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Hi,
----------------------------------------As a starting point suggest to visit previous threads discussing the pros of 64 bit Os + client. In a nutshell, yes there is a performance gain, even whilst all WCG science applications have 32 bit compilations only. cheers
WCG
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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Hello Hypernova,
----------------------------------------Yes, there are some little differences between projects regarding 32/64 bit operating system even if the work is only 32 bit compiled. You will notice some improvements (around 5-10%) with projects having a large part of integer work. The typical example is HCC. Likewise HCMD2 seems to be more "integer oriented" than other projects. Until we will not have a formal amd reliable analysis of the distribution of integer vs. float calculation, we can only observe and speculate.  A major improvement would happen if, in the future, WUs would be also 64 bit compiled.  Cheers, Yves |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
The amount of RAM installed doesn't affect crunching performance as long as you have "enough". Meaning, your RAM never becomes full during normal use with BOINC running.
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