XP and 4GB RAM - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Software > Microsoft Windows and Software
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 03-19-2006, 08:40 PM   #1 (permalink)
Techie Beyond Description
 
Osiris's Avatar
 
Join Date: Jan 2005
Location: Kentucky
Posts: 36,817
Send a message via ICQ to Osiris Send a message via AIM to Osiris Send a message via MSN to Osiris Send a message via Yahoo to Osiris
Default XP and 4GB RAM

The problem lies with how Windows XP allocates physical address space for devices. As you all know, XP is a 32-bit Operating System and has a total of 4gb memory space. Hardware devices will take I/O address resources from this 4GB. For Example, the 3.75gb~4.00gb (256mb) memory space is reserved for I/O APIC and BIOS EPROM; 3.50gb~3.75gb is reserved for configuration-space memory-mapping access for PCI Express, 3.25gb~-3.50gb is reserved for PCI Bridge devices such as the IDE Controller, USB Devices, and Onboard audio. When you have a PCI Express graphics card with 256mb of ram, 3gb~3.25gb will be allocated to the first PCI Express graphics card. A second PCI-E card would take another 256mb in the 2.75gb~out of 4gb of memory available for Windows applications. Memory remapping could be a solution, but theres a performance cost and some drivers might fail with the physical address extension enabled. The easy way around this is Windows XP 64-bit OS.
__________________

__________________
Osiris is offline  
Old 03-19-2006, 10:00 PM   #2 (permalink)
Monster Techie
 
Ridlyn's Avatar
 
Join Date: May 2005
Posts: 1,920
Default

ok
__________________

__________________
Quote:
Originally Posted by Sylus View Post
Could have been worse, you could have been raped by a clown.
Ridlyn is offline  
Old 03-20-2006, 03:56 PM   #3 (permalink)
Lord Techie
 
gurusan's Avatar
 
Join Date: Jan 2006
Location: Portland, OR
Posts: 6,562
Send a message via MSN to gurusan
Default

werd
__________________
|| 2500K @ 5GHz 1 thread, 4.8 2 threads, 4.6 3, 4.5 4 1.284V ||
|| P8P67-M Pro || 8GB @ 2133MHz ||
|| 5850 @ 1000/1225 || XFX 650W || Silverstone FT03B ||
|| 37" LCD TV || CM Hyper 212+ || Samsung 2.1 Soundbar ||
gurusan is offline  
Old 03-20-2006, 04:00 PM   #4 (permalink)
Wizard Techie
 
Join Date: Oct 2004
Posts: 4,010
Default

Thank you for that Warez.
__________________

Cisco CCNA, Comptia A+, 1/3 through CCNP
Trifid is offline  
Old 03-20-2006, 05:58 PM   #5 (permalink)
Ultra Techie
 
Join Date: Dec 2005
Posts: 823
Default

sooo, would 4gb work with 64-bit xp?
harry18 is offline  
Old 03-20-2006, 06:45 PM   #6 (permalink)

Triforcer
 
Baez's Avatar
 
Join Date: Sep 2005
Location: Toronto, Canada
Posts: 6,987
Default

ya im getting the 64 bit version for my second comp running an athlon 64 so i wonder. but i only have 1 gig of ram. no need for more right now until vista and then vista will support much more
__________________


Baez is offline  
Old 03-21-2006, 12:22 AM   #7 (permalink)
Chillin Techie
 
Join Date: Nov 2004
Location: USA
Posts: 11,861
Default

that pretty much explain why my computer got much slower when
I upgraded my ram.

the problem with 64 bit windows is... A lot of stuff don't work with it.

I want to edit video with it, but it won't recognize my hardware encoder card for one
__________________

__________________
The Ultimate Hard Drive Utility PowerMax 4.23. (It now has the ability to clean a Boot Sector virus on the quick erase option.)
The best browser Netscape 8
Have you accidently delete something? Look here (trial. the better one) and here(free)
EricB is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:32 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.