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Old 07-23-2009, 09:10 PM   #1
NeXuS_2006
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Ram update requires 64bit OS?


My Dell D820 laptop has 2 GB ram (2x1GB). I wanted to update to 4 GB (2x2GB), but when I was looking around newegg, all the reviews were talking about 64 bit OSes being necessary. Is this true? Why? If I buy 2 2GB sticks and throw them in, will it just not use all the memory or will it not work at all? Is there any reason to or to not upgrade to a 64 bit OS? I thought you only needed and could only use a 64 bit OS with a 64 bit CPU...
 
Old 07-23-2009, 10:36 PM   #2
{BBI}Nexus{BBI}
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You don't have to run a 64bit OS unless you install more than 4Gb.
 
Old 07-23-2009, 10:41 PM   #3
custangro
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Quote:
Originally Posted by NeXuS_2006 View Post
My Dell D820 laptop has 2 GB ram (2x1GB). I wanted to update to 4 GB (2x2GB), but when I was looking around newegg, all the reviews were talking about 64 bit OSes being necessary. Is this true? Why? If I buy 2 2GB sticks and throw them in, will it just not use all the memory or will it not work at all? Is there any reason to or to not upgrade to a 64 bit OS? I thought you only needed and could only use a 64 bit OS with a 64 bit CPU...
4GB is the limit...anything more than that requires either a 64-bit OS *OR* installing kernel-PAE

Not sure what distro you are using...but in the Red Hat based distros the package is called kerenl-PAE

-C
 
Old 07-24-2009, 02:34 PM   #4
lazlow
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Generally with a 32bit OS and not using a PAE kernel you will only have about 3.1Gb(ish) available for use. Depending on what you are doing (specifically) switching to a 64bit OS may see no difference in performance or a large increase in performance. Tasks that use large amounts of ram will see large increases in performance (converting videos, editing large photos, etc). Tasks that do not use large amounts of ram (web browsing, email, general office tasks) will not see significant changes in performance.
 
Old 07-25-2009, 04:47 AM   #5
jay73
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Well, if you CPU is 32 bit, you will need a 32 bit OS but you can still use a PAE kernel to access over 3.xx GB RAM - that is the reason PAE was originally created.
 
  


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