Tom's Hardware > Forum > Motherboards & Memory > Memory > P5B-Deluxe remap feature with 32-bit XP

P5B-Deluxe remap feature with 32-bit XP

Forum Motherboards & Memory : Memory - P5B-Deluxe remap feature with 32-bit XP

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!

Forum

ASUSP5B&KINGSTON KHX6400D2/1G HYPERX PC6400 as PC5300!

Ask the community Add a reply

Bottom Search this thread

I'll try to do this fast.

I have a dual-boot system (P5B-Deluxe, 4*1GB DDR2-800 memory, E6600 @ 3.0ghz rock stable, Asus X1950Pro) with both WXP Home 32 bit AND Vista Home Premium 64 bit. I enabled memory remap feature in my BIOS so I could use my whole 4GB memory under Vista.

The problem is that I now see "only" 2GB when working with XP. It's really not the end of the world, but is there a way to change this?

I know there is something you can change in the boot.ini to make Intel (AMD also maybe, not sure) cpu see more then 4GB of memory when in a 32-bit Microsoft OS, in my case up to 6GB (2GB memory, then 2GB reserved for drivers and finally 2GB remapped). It's only that I don't want to play with XP boot.ini if that might prevent me from going into Vista.

I looked around with google but found nothing. Anybody has a link for me of some quick explainations?

Thanks in advance for any help.

Message edited by NightlySputnik on 09-06-2007 at 07:56:22 PM

------------------------------ My new PC:
E6600 OC to 3.0+GHZ
6GB OCZ DDR2@833 (4-4-4-15)
Asus P5B Deluxe

Add a reply

NS, I'm no expert on this but I have the same rig you have, except for the video card. With 4 gig installed enabling memory remap will drop you down to 2 gig in 32 bit and I do not think there is any way around this. At least none that I could find after some serious Googling.

And yes, unless you enable memory remapping you cannot get your full 4 gig in your 64 bit Vista.

For what it's worth I do not think there is any way to really use 4 gig in a 32 bit os. The 32 bit OS can only ADDRESS 4 gig. That's the limit. And since other devices aside from your system RAM have addressable memory the OS must reserve some addressing for those devices thus reducing you down to about 3 gig+/- useable system RAM.

IIRC there is a fix, PAE, I think it's called, for getting some 32 bit apps to use a larger chunk of memory than they are usually allotted but this is only for server OS and some special apps such as SQL server. But I'm a little foggy on that.

It's pretty much a done deal that with 32 bit you have to live with what you get - about 3 gig+/-.

If there is a way to leave remapping enabled and get the 3 gig seen in 32 bit I'd love to hear about it. I could find no fix for that.

I suppose leaving remapping enabled might be the best bet for us since XP doesn't really need more than 2 gig RAM, from what I have heard anyway.

Message edited by notherdude on 09-05-2007 at 05:48:12 PM

Reply to notherdude

nd is right: you need remapping to go to 4GB or more with a 64-bit OS, but you need remapping off for a 32-bit OS.

Reply to Mondoman

It would be a couple of extra steps each time you reboot to a different OS but, you could manually change it in the bios. Also, does that MOBO save bios profiles? If so, you could save one of each and have them available when you boot each time and choose the option that fits the OS you are going to run.

Message quoted 1 times

Reply to XMSYellowbeard

XMSYellowbeard wrote :

It's PAE that I had in mind, but I guess it'll be quite difficult (if possible) to get it to work under WXP Home Edition.

Like notherdude says, it's better to have XP at 2 GB then both Vista and XP at 3GB without remapping. Anyway, XP is there only for older application that won't run under Vista 64 bit.

Thanks all of you.

Reply to NightlySputnik

Microsoft has essentially disabled PAE use for increased memory under the consumer versions of Windows. It can only be used to enable the execute-disable (XD) functionality.

Reply to Mondoman

Agreeance with Mondoman the PAE switch is useless under XP.

I have the same mobo with 4gb ram and XP 32Bit, if i do not enable remap the BIOS only detects 3.***GB and windows uses this. With it Enabled i get 4Gb in the BIOS and 2Gb in windows. I dont know if this has changed with new BIOS Rev. though.

Id suggest setting up a BIOS profile for vista and XP changing this option to suit the OS of choice. In any case XP is never going to use all your 4Gb infact it will only ever use around 3Gb.

Message quoted 1 times

------------------------------ "This thread made me strap on my lolerskates and head for my roflcopter."
Reply to chookman

chookman wrote :

I'll try updating my BIOS to the last one (I think I'm still at 604 or something like that :pfff: ).

If that doesn't work, I'll just do dual-bios setting depending on which OS I plan on starting.

Thanks all.

Reply to NightlySputnik

Ask the community Add a reply

Tom's Hardware > Forum > Motherboards & Memory > Memory > P5B-Deluxe remap feature with 32-bit XP

Go to:

Help |
Forum rules

There are 897 identified and unidentified users. To see the list of identified users, Click here.

Page generated in 0.351 seconds

Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel

Focus On

P5B-Deluxe remap feature with 32-bit XP

Forum Motherboards & Memory : Memory - P5B-Deluxe remap feature with 32-bit XP

Please mind