Page 1 of 2 12 LastLast
Results 1 to 16 of 30

Thread: What happens with 4Gb RAM under XP?

  1. #1
    Senior Member JPreston's Avatar
    Join Date
    Nov 2005
    Posts
    1,667
    Thanks
    5
    Thanked
    124 times in 74 posts

    What happens with 4Gb RAM under XP?

    Hi All

    I'm in the process of ordering up parts for a new PC and was intending to buy 4Gb RAM (2x 2Gb DDR2-6400), because RAM is cheap enough and this way I'll be ready for Vista when it eventually stops sucking.

    But what happens in the meantime while I am running XP? I think XP only supports 2Gb, but does this mean that my PC will work perfectly albeit with the extra 2Gb going unused or will it give me stability problems? Will I still be getting the benefit of dual-channelness or will I just be using one stick?

    Quote Originally Posted by Bertrand Russell

    The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.

  2. #2
    Demonizing
    Join Date
    Mar 2007
    Location
    Bristol, UK
    Posts
    318
    Thanks
    3
    Thanked
    6 times in 6 posts
    • Optical668's system
      • Motherboard:
      • Intel Purebreed Masterboard
      • CPU:
      • 80,000 GHZ Flux Capacitor
      • Memory:
      • Six Hundred and Sixty Six Megs of Ramming Speed
      • Storage:
      • Western Digital Powerdrive Ten Thousand Terabytes
      • Graphics card(s):
      • Nvidia 88 Thousand Supercard
      • PSU:
      • Nuclear Fussion Core Reactor 1.21 gigawatts
      • Case:
      • Akasa 62 Reactor Housing
      • Monitor(s):
      • 100" Iiyama LCD
      • Internet:
      • OC-768 40,000 Mbit/s

    Re: What happens with 4Gb RAM under XP?

    If you use XP32bit it will get maxed to 3GB, if you use XP64bit it will use 4GB. There seems to be no stability issues as i got 4GB and use XP32bit.
    Hell and Fire was spawned to be released.

  3. #3
    Fried Chip Extremist alsenior's Avatar
    Join Date
    Nov 2005
    Location
    Stafford
    Posts
    2,948
    Thanks
    102
    Thanked
    191 times in 145 posts
    • alsenior's system
      • Motherboard:
      • DFI Lanparty Jr x58-T3H6
      • CPU:
      • Core i7 920
      • Memory:
      • 6 x 2GB ocz Gold
      • Storage:
      • 1 TB Samsung F3
      • Graphics card(s):
      • 1gb 4890 vapor-x xfire
      • PSU:
      • xfx 850W
      • Case:
      • Lian-li Pc7
      • Operating System:
      • Windows 7 X64
      • Monitor(s):
      • Dell 2208WFP
      • Internet:
      • 30mb Virgin media

    Re: What happens with 4Gb RAM under XP?

    it will use 4gb minus whatever the motherboard sets for the size of the 32bit memory whole. you should get at least 3.25gb unlis you have got a graphics card with a uber amount of video ram
    Quote Originally Posted by Jay View Post
    What kind of emergency would need Windows 95? I think you are already in a bad state of emergency when your backup plan is Windows 95.
    Beginners guide to raid Beginners guide to raid post edition Hexus.Social - FAQ

  4. #4
    Senior Member 2Cold Scorpio's Avatar
    Join Date
    Aug 2007
    Location
    Greenvile, NC, U.S.A.
    Posts
    802
    Thanks
    15
    Thanked
    13 times in 12 posts
    • 2Cold Scorpio's system
      • Motherboard:
      • Abit IP-35 Pro, Sound Card: Creative X-Fi XtremeGamer
      • CPU:
      • Intel Core 2 Duo E6750 w/ G0 stepping - stock: 2.66 GHz OC'd to 3.6 GHz 1.48v
      • Memory:
      • 4x1GB Patriot PDC24G6400LLQK Extreme Performance PC2-6400 OC'd to 900MHz 5-5-5-18 timings 2.2v
      • Storage:
      • 2TB Samsung Spinpoint F4 5200rpm (main), 2x 250 GB Seagate Barracuda 7200.10 SATA in RAID 0 (backup)
      • Graphics card(s):
      • eVGA Geforce GTX 460 1GB Superclocked
      • PSU:
      • Antec NeoBlue 650w
      • Case:
      • Raidmax Smilodon Steel ATX
      • Operating System:
      • Microsoft Windows 7 Professional 64-bit
      • Monitor(s):
      • Samsung 226BW 22" LCD Widescreen (S-Panel) @ 1680x1050
      • Internet:
      • 15Mb/s Cable, Optical Drives: 1. Lite-On DVD+-R/+-RW/RAM w/ Lightscribe, 2. LiteOn CD-RW 52/32/52x

    Re: What happens with 4Gb RAM under XP?

    I have 4 GBs of RAM with both 32-bit XP and Vista and it works fine; it just recognised about 3.2 GBs (I have a 512 MB video card and a dedicated sound card, etc.) of it, but i still get complete dual-channel capability with my four 1 GB sticks.

  5. #5
    No-one's Fanboi Thorsson's Avatar
    Join Date
    Nov 2004
    Location
    Neverneverland
    Posts
    2,749
    Thanks
    47
    Thanked
    93 times in 92 posts
    • Thorsson's system
      • Motherboard:
      • ASUS P8Z77-V PRO
      • CPU:
      • i5 3570k
      • Memory:
      • 2x8Gb Corsair Vengeance PC1866
      • Storage:
      • 256M4 SSD; 2Tb 7200RPM Barracuda; 2Tb Linkstation
      • Graphics card(s):
      • EVGA GTX970 SC
      • PSU:
      • Corsair HX650
      • Case:
      • Antec 300
      • Operating System:
      • Win10 64
      • Monitor(s):
      • Dell 2515H
      • Internet:
      • Fibre Optic 30Mb

    Re: What happens with 4Gb RAM under XP?

    This is possibly the most asked question around.

    1. It's not XP, it's any 32-bit OS.

    2. Apart from the ~3.2Gb barrier, there is also a limit of 2Gb on any one program.

  6. #6
    HEXUS.social member Agent's Avatar
    Join Date
    Jul 2003
    Location
    Internet
    Posts
    19,159
    Thanks
    733
    Thanked
    1,605 times in 1,044 posts

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by Thorsson View Post
    1. It's not XP, it's any 32-bit OS.
    Aye, its 4Gb natively, but almost all other 32bit OS's support PAE. Even Windows 2000 (Intel Physical Addressing Extensions (PAE) in Windows 2000) which allows addressing far above 4Gb.

    XP has PAE purposely locked out sadly.
    Mad isn't it?
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

  7. Received thanks from:

    Thorsson (25-01-2008)

  8. #7
    No-one's Fanboi Thorsson's Avatar
    Join Date
    Nov 2004
    Location
    Neverneverland
    Posts
    2,749
    Thanks
    47
    Thanked
    93 times in 92 posts
    • Thorsson's system
      • Motherboard:
      • ASUS P8Z77-V PRO
      • CPU:
      • i5 3570k
      • Memory:
      • 2x8Gb Corsair Vengeance PC1866
      • Storage:
      • 256M4 SSD; 2Tb 7200RPM Barracuda; 2Tb Linkstation
      • Graphics card(s):
      • EVGA GTX970 SC
      • PSU:
      • Corsair HX650
      • Case:
      • Antec 300
      • Operating System:
      • Win10 64
      • Monitor(s):
      • Dell 2515H
      • Internet:
      • Fibre Optic 30Mb

    Re: What happens with 4Gb RAM under XP?

    Ta for that. I have to say that it was the 2Gb limit per program that drove me to Vista64.

  9. #8
    radix lecti dave87's Avatar
    Join Date
    Sep 2005
    Location
    England
    Posts
    12,806
    Thanks
    657
    Thanked
    931 times in 634 posts
    • dave87's system
      • Motherboard:
      • Asus
      • CPU:
      • i5 3470k under Corsair H80 WC
      • Memory:
      • 8gb DDR3
      • Storage:
      • 240gb SSD + 120gb SSD
      • Graphics card(s):
      • Asus HD7950
      • PSU:
      • XFX 600w Modular
      • Case:
      • Lian Li PC-A05FNB + Acoustipack
      • Operating System:
      • Windows 10 Pro
      • Monitor(s):
      • 2x Dell S2309W (1920x1080)
      • Internet:
      • BT Infinity Option 2

    Re: What happens with 4Gb RAM under XP?

    Win2k needed it cause of its server permutations which are still widely used. I don't think 2k Workstations can do the same, its just the Server variants.

  10. #9
    Fried Chip Extremist alsenior's Avatar
    Join Date
    Nov 2005
    Location
    Stafford
    Posts
    2,948
    Thanks
    102
    Thanked
    191 times in 145 posts
    • alsenior's system
      • Motherboard:
      • DFI Lanparty Jr x58-T3H6
      • CPU:
      • Core i7 920
      • Memory:
      • 6 x 2GB ocz Gold
      • Storage:
      • 1 TB Samsung F3
      • Graphics card(s):
      • 1gb 4890 vapor-x xfire
      • PSU:
      • xfx 850W
      • Case:
      • Lian-li Pc7
      • Operating System:
      • Windows 7 X64
      • Monitor(s):
      • Dell 2208WFP
      • Internet:
      • 30mb Virgin media

    Re: What happens with 4Gb RAM under XP?

    last time i checked xp supported PAE there i a param to pass at boot but im sure it supports it
    Quote Originally Posted by Jay View Post
    What kind of emergency would need Windows 95? I think you are already in a bad state of emergency when your backup plan is Windows 95.
    Beginners guide to raid Beginners guide to raid post edition Hexus.Social - FAQ

  11. #10
    NOT Banned
    Join Date
    Jan 2007
    Posts
    5,905
    Thanks
    412
    Thanked
    278 times in 253 posts

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by alsenior View Post
    last time i checked xp supported PAE there i a param to pass at boot but im sure it supports it
    /3GB at the end of the boot.ini iirc

  12. #11
    HEXUS.social member Agent's Avatar
    Join Date
    Jul 2003
    Location
    Internet
    Posts
    19,159
    Thanks
    733
    Thanked
    1,605 times in 1,044 posts

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by alsenior View Post
    last time i checked xp supported PAE there i a param to pass at boot but im sure it supports it
    It was removed in SP2 IIRC, but its certainly no longer supported in XP

    Edit - The 36-bit address bit, just to make things clear.
    Last edited by Agent; 25-01-2008 at 02:32 PM.
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

  13. #12
    WEEEEEEEEEEEEE! MadduckUK's Avatar
    Join Date
    May 2006
    Location
    Lytham St. Annes
    Posts
    17,293
    Thanks
    649
    Thanked
    1,580 times in 1,006 posts
    • MadduckUK's system
      • Motherboard:
      • Asus A88XM-PLUS
      • CPU:
      • AMD 860K @4.45
      • Memory:
      • 16GB (4x4GB) PC3-12800
      • Storage:
      • 1x240GB Sandisk Extreme / 3x500GB RAID0 / 3GB Backup
      • Graphics card(s):
      • Radeon 7870XT
      • PSU:
      • Corsair TX750w
      • Case:
      • Cooler Master Galdiator 600
      • Operating System:
      • Windows 10 x64
      • Monitor(s):
      • DELL S2409W
      • Internet:
      • 3 One Plan

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by Agent View Post
    It was removed in SP2 IIRC, but its certainly no longer supported in XP
    or maybe its enabled by default
    Quote Originally Posted by Ephesians
    Do not be drunk with wine, which will ruin you, but be filled with the Spirit
    Vodka

  14. #13
    HEXUS.social member Agent's Avatar
    Join Date
    Jul 2003
    Location
    Internet
    Posts
    19,159
    Thanks
    733
    Thanked
    1,605 times in 1,044 posts

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by MadduckUK View Post
    or maybe its enabled by default
    If it was, there would be no 4Gb addressing limit
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

  15. #14
    Senior Member
    Join Date
    Jan 2004
    Location
    Leicestershire
    Posts
    1,211
    Thanks
    6
    Thanked
    31 times in 30 posts
    • madman045's system
      • Motherboard:
      • P9X79 Pro
      • CPU:
      • I7-3820
      • Memory:
      • 32GB
      • Storage:
      • Not enough!
      • Graphics card(s):
      • HD7970
      • PSU:
      • 850w Corsair
      • Case:
      • Corsair Carbide 300R
      • Operating System:
      • Win 7 Ultimate X64
      • Monitor(s):
      • Dell U2713HM & 2007WFP
      • Internet:
      • Plusnet FTTC - 30mbit/7mbit

    Re: What happens with 4Gb RAM under XP?

    Physical Address Extension - PAE Memory and Windows

    Apparently just reading the 1st bit you can use either /PAE or /noexecute in the boot.ini file...

  16. #15
    Member
    Join Date
    Jan 2008
    Posts
    187
    Thanks
    5
    Thanked
    3 times in 3 posts
    • 306maxi's system
      • Motherboard:
      • P5K Premium
      • CPU:
      • E8400
      • Memory:
      • 4gb Corsair Dominator 8500
      • Storage:
      • 36gb raptor
      • Graphics card(s):
      • HD4870 512
      • PSU:
      • Antec NeoHE 550W
      • Case:
      • P180
      • Monitor(s):
      • Samsung SM2433BW

    Re: What happens with 4Gb RAM under XP?

    Quote Originally Posted by Agent View Post
    Aye, its 4Gb natively, but almost all other 32bit OS's support PAE. Even Windows 2000 (Intel Physical Addressing Extensions (PAE) in Windows 2000) which allows addressing far above 4Gb.

    XP has PAE purposely locked out sadly.
    Mad isn't it?
    All the PAE switch lets you do is see the RAM. The OS will still only address 4gb of ram in total and will not use any additional RAM above this although you'll be able to see it.

  17. #16
    Lovely chap dangel's Avatar
    Join Date
    Aug 2005
    Location
    Cambridge, UK
    Posts
    8,385
    Thanks
    407
    Thanked
    449 times in 331 posts
    • dangel's system
      • Motherboard:
      • See My Sig
      • CPU:
      • See My Sig
      • Memory:
      • See My Sig
      • Storage:
      • See My Sig
      • Graphics card(s):
      • See My Sig
      • PSU:
      • See My Sig
      • Case:
      • See My Sig
      • Operating System:
      • Windows 10
      • Monitor(s):
      • See My Sig
      • Internet:
      • 60mbit Sky LLU

    Re: What happens with 4Gb RAM under XP?

    PAE is a hack - go 64bit it's the only true way to use all the memory properly. Full Stop. Period. As in THATS YER LOT.

    This has been discussed soooooooo much here.
    System 001: Maximus VII Formula, 4790k i7, RTX 2080ti FE (incoming), 16GIG Corsair Vengence DDR3 RAM CL9, Corsair HX1000, ROG SWIFT PG278Q , SSDs, Antec 1200 case, All watercooled. [main]
    System 002: A8 3850 APU, ASUS uATX FM1A75 MB, 4GB Corsair Vengeance DDR3, Corsair psu, OCZ Agility 3, 1TB F3, Dell 2001FP 20" LCD, £7's worth of 5.1 speakers (they rock) Windows 7 x64[wife/server]
    System 003: AsRock MB, APU, 8 GIG Corsair, Silverstone HTPC case, stock cooler, GT220 1gbDDR3, WD Green 3TB, Kingston 40gb SSD, MCE Remote, Panasonic 50" LCD (87BDX) via HDMI Windows 8.1.1 (32) [media centre]
    System 004: Asus UL50AT Intel Core 2 Duo,4GB, Intel Gen 2 80GB SSD, Win 8.1.1 x64 [no justification]
    System 005: HP Proliant N40L Microserver, 4x2TB drives, fan mod, Pico PSU mod, Win7 x86 [file server]
    System 006: Dell Optiplex 9010, i7, 8gb, 128gb Samsung 830 x 2 (boot and VM drive), 1TB WD HDD, ATI something, Windows 8.1.1 x64 RTM [work]


Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. C2D Overclocking Guide for Beginners
    By Clunk in forum PC Hardware and Components
    Replies: 908
    Last Post: 17-06-2008, 07:00 PM
  2. Need advice for 4GB (2x2GB) Ram Kits
    By OriginalDon in forum PC Hardware and Components
    Replies: 2
    Last Post: 24-08-2007, 04:59 PM
  3. Shuttle SN45G and TwinMOS DDR400 RAM
    By nb45 in forum PC Hardware and Components
    Replies: 0
    Last Post: 15-04-2004, 06:01 PM
  4. What should I do about my RAM?
    By spindle in forum PC Hardware and Components
    Replies: 2
    Last Post: 20-03-2004, 02:44 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •