3GB or 4GB?

[igivanovg]

I am planning to buy a new PC w/Win XP Home (32 bit), and I am
confused
as to whether it can make use of 4GB or only 3GB + a little extra.
Most of gurus out there but most of them eventually refer to

http://support.microsoft.com/?kbid&id=888137

which confuses it even more . It says about what windows reports
to the user, but doesn't say if the balance of RAM (up to 4GB) is
actually used by the system for anything behind the scenes. In one
place I read it would be used by the integrated graphics on a system
with shared RAM (which would not be the case on the system I am
planning to buy as I'd have a dedicated video card). So I am still
unsure if spending extra $80 on 4GB vs 3GB makes any sense.

Any ideas?

 

[Bob Willard]

I am planning to buy a new PC w/Win XP Home (32 bit), and I am
confused
as to whether it can make use of 4GB or only 3GB + a little extra.
Most of gurus out there but most of them eventually refer to

http://support.microsoft.com/?kbid&id=888137

which confuses it even more . It says about what windows reports
to the user, but doesn't say if the balance of RAM (up to 4GB) is
actually used by the system for anything behind the scenes. In one
place I read it would be used by the integrated graphics on a system
with shared RAM (which would not be the case on the system I am
planning to buy as I'd have a dedicated video card). So I am still
unsure if spending extra $80 on 4GB vs 3GB makes any sense.

Any ideas?

32-bit versions of WinWhatever have a 4GB address space limit. Some of
that 4GB is used to map virtual addresses to I/O space, and the rest is
used to map virtual addresses to RAM; leaving you with 3+ GB of
addressable RAM. So spending more $s to get 4GB of RAM, of which only
3-1/4 GB (or so) is usable, may not be a wise investment. And, yes,
that other 3/4 GB of RAM is wasted (ignoring the remapping that might
be done to handle bad RAM).

 

[billybobbbuddy]

Windows XP Home 32 bit 3GB or 4GB?

As far as what I understand from the computer Guru's like Chris Pirello and some other fine computer geeks, Windows XP Home Edition 32 bit, will only hold at the most is 2GB of RAM. Now if you are looking for more RAM, then you would have to go to a 64 bit system, like Windows XP Pro. or Windows Vista, because 64 bit can go as high as 4 to 8GB of RAM., depending on what you plan to do with your computer. If you plan on just surfing the web or emailing, or doing some light coping of CD's or DVD's, then 32 bits of 1-2GB's of RAM is fine. But, if you plan on doing more, like gaming, major media copying or doing multi-tasking, meaning doing several things at once, then 64 bit system with 4-8GB's of RAM is your besy bet. I hope this helps.

 

[igivanovg]

32-bit versions of WinWhatever have a 4GB address space limit. Some of

that 4GB is used to map virtual addresses to I/O space, and the rest is
used to map virtual addresses to RAM; leaving you with 3+ GB of
addressable RAM. So spending more $s to get 4GB of RAM, of which only
3-1/4 GB (or so) is usable, may not be a wise investment. And, yes,
that other 3/4 GB of RAM is wasted (ignoring the remapping that might
be done to handle bad RAM).

Thanks Bob!

The only question remains whether the RAM dual-channel capability for
which 2x2GB is a requirement (as stated by Dell where I am looking to
buy the PC), gives a minuscule or real speed gain for the system and
is worth extra $$. I suspect the former.

 

[igivanovg]

The only question remains whether the RAM dual-channel capability for

which 2x2GB is a requirement (as stated by Dell where I am looking to
buy the PC), gives a minuscule or real speed gain for the system and
is worth extra $$. I suspect the former.

Found it:

http://www.tomshardware.com/2007/10/17/parallel_processing/page11.html

As expected.