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Windows XP SP2 and 4GB Ram

By rgoodman ·
Is there an issue with XP seeing 4 GB ram? I had not heard of any and had not seen any until today.
I have run 4GB on a couple of other workstations and havent seen the issue. I put 4GB in this workstation and it sees 3GB. Any insight?

Thx

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See these articles

by IC-IT In reply to Windows XP SP2 and 4GB Ra ...

XP w/SP2 and PAE mode;
http://support.microsoft.com/kb/888137

The /3GB switch and PAE;
http://support.microsoft.com/kb/291988

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Chip Set Limitations

by TheChas In reply to Windows XP SP2 and 4GB Ra ...

Many chip-sets while capable of addressing 4 GB of RAM limit user RAM to 3 GB. This is because the chip-set uses most of the top 1 GB for temporary storage addresses and buffers.

"Usually" when this is the case, the BIOS will only report the first 3 GB of RAM. However, to reduce complaints, some motherboard manufactures set the BIOS to report all RAM even if some ends up in restricted address space.

Chas

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Chip Set Limitations

by TheChas In reply to Windows XP SP2 and 4GB Ra ...

Many chip-sets while capable of addressing 4 GB of RAM limit user RAM to 3 GB. This is because the chip-set uses most of the top 1 GB for temporary storage addresses and buffers.

"Usually" when this is the case, the BIOS will only report the first 3 GB of RAM. However, to reduce complaints, some motherboard manufactures set the BIOS to report all RAM even if some ends up in restricted address space.

Chas

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Chip Set Limitations

by TheChas In reply to Windows XP SP2 and 4GB Ra ...

Many chip-sets while capable of addressing 4 GB of RAM limit user RAM to 3 GB. This is because the chip-set uses most of the top 1 GB for temporary storage addresses and buffers.

"Usually" when this is the case, the BIOS will only report the first 3 GB of RAM. However, to reduce complaints, some motherboard manufactures set the BIOS to report all RAM even if some ends up in restricted address space.

Chas

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Thanks

by rgoodman In reply to Chip Set Limitations

Thank you for all replies.

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SOLUTION FOR NOT SHOWN IN WINDOWS 4GB RAM

by imran_ykgn In reply to Windows XP SP2 and 4GB Ra ...

IF U R GETTING MEMORY 4GB IN BIOS(CMOS). SO U WILL GET THE 4GB SPEED IN WIN XP. IN WIN XP SETTING U WILL DO SEETING IN BOOT.INI
MY COMPUTER RIGHT CLICK-PROPERTIES-ADVANCED-GOTO STARTUP AND RECOVERY CLICK ON SETTING -CLICK ON EDIT-AFTER EDITTING BOOT.INI - GO TO FASTDETECT AND ADD THIS (E.G = FASTDETECT /PAE ) SAVE AND EXIT AND RESTART UR COMPUTER AFTER RESTARTED UR PC GOES TO MY COMPUTER RIGHT CLICK PROPERTIES U WILL GET THE 4GB RAM SPEED

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Boot.ini example please

by wg_schmitt In reply to SOLUTION FOR NOT SHOWN IN ...

This is my boot.ini. How should it look with Imran's edit?

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetec

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Windows Vista SP1

by liamluvu In reply to SOLUTION FOR NOT SHOWN IN ...

Windows Vista service Pack 1 automatically comes up with 4gb ram. Juat adding on to my last post.

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You're hosed.

by homertbush In reply to Windows XP SP2 and 4GB Ra ...

Hey dude, there's a decent break down here:
http://blog.tylerholmes.com/2008/03/and-then-win-xp-sp2-wouldn-give-me-4-gb.html

Essentially Win XP CAN address 4GB of memory (it's a 32 bit OS after all) but some of that memory space is reserved for system devices and other components like YOUR VIDEO CARD.

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4gb Wont work in XP

by liamluvu In reply to Windows XP SP2 and 4GB Ra ...

In Windows XP 4gb ram will not work. when people say oh yes it does there bullshitting. If you have 4 ram slots on your motherboard/mainboard, the best and most efficient outcome would be to have 2x1gb sticks and 2x512mb sticks for the most efficient way to run your PC. Even more efficient that 2x2gb sticks. Any other queries please contact me at liam.scarrott@bigpond.com and if anyone would like a new PC please get in contact with me and I will be happy to help you choose the best for you. thanks

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