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Will XP Pro utilize 1.GB RAM Fully?

dalfollo

Senior member
I have a KT7-RAID with 2 sticks of 256 for a total of 512MB I am thinking about adding some memory as I am doing more video intensive work, and the PC is being used more as a constant file server...

According to the MB I can have up to 1.5GB of RAM in three sticks...I am looking to get a 512MB stick to make the total for 1GB memory...I am running WinXP Pro, and wanted to see is i can expect XPPro to utilize all my memory

I will likely get Crucial CA=2 memory like the old memory I got about three years ago...any feedback?
 
Will XP Pro consume 1.5 GB oif memory? Yes!!! It is Microsoft after all. 🙂

Seriously though, Windows can handle up to 2 GB of memory just fine. Above that, it needs to start using tricks to access the memory.
 
i upgraded from 512 to 1gb and i noticed a difference, albeit minor. it could also be my mind playing tricks with me.

if you're not doing anything fancy they're wont be much difference.
 
One thing to keep in mind that I learned the hard way...

My P4B533 has three RAM slots. To use all three slots, all three modules need to be ECC. I loaded up 3x512 PC2700 (two Cricial, one Samsung, all non-ECC) and Windows only saw a gig. So check your mobo specs again.

Otherwise, 512 is considered the "sweet spot" for most systems, whereas they will see little or no improvement above 512. There are exceptions, such as a butt-load of open TIFF files in Photoshop and such. If you're going to be doing a lot of video editing, and in long segments, then yeah, a gig will definitely help here as well.
 
It helped me somewhat in video editing, and helped a ton in newer games.

This is going from 512mb to 1gb
 
I believe WinXP itself can utilize 1GB of RAM, and Applications can address another 2GB of RAM. So the answer would be yes XP Pro can utilize 1GB of RAM fully, it can utilitze 2.5-3GB of RAM under certain memory intensive application(s).
 
Originally posted by: digitalsm
I believe WinXP itself can utilize 1GB of RAM, and Applications can address another 2GB of RAM. So the answer would be yes XP Pro can utilize 1GB of RAM fully, it can utilitze 2.5-3GB of RAM under certain memory intensive application(s).
Close, but not quite clear enough for me to tell if you really understand it. 😉

Basically, on 32 bit systems, each application address 4GB of RAM, but it is split 2GB/2GB (or 3GB/1GB with a hack) on a Windows system, so the application only gets 2GB, and the other 2GB is used for other purposes (the OS doesn't actually consume all of it, but it is used by the OS somehow). So (if I understand correctly), even if you have a Xeon server with 32GB of RAM (using PAE to access it all), the most any one application could use would be 3GB.

Therefore, under Windows NT/2000/XP, if you put 4GB of RAM into your system (the max for standard 32 bit systems), any one application can only use 2GB, but two applications could each use 2GB (minus a few hundred MB to account for the OS). Under Windows 9x/ME, things start to top out at around 512MB, but you can use a hack to get above 1GB and beyond; of course, there's very little point in this, because you're still limited by the same miniscule amount of "System Resources," and after all, who would want to trust an enterprise-level application that demands the "five nines of reliability" (or however that goes) to an old, outdated, and crappy OS?
 
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