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  Windows XP 64bit not recognizing above 3GB of RAM 
 
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Charlie Lj May 13, 2009, 09:18pm EDT Report Abuse
My motherboard is Supermicro x6da8-g2. I put in 8GB of RAM in all the slots;however, for some reason Windows XP 64bit does not recognized above 3GB of RAM.

1. What could have gone wrong?

2. Is there a way to check this in the BIOS? If so, where in the BIOS do I check if BIOS is at least recognizing the full 8GB of RAM?

Thanks for any suggestion.


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Sean Costello May 13, 2009, 11:41pm EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
i believe you need to enable Memory Remapping in BIOS

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john albrich May 14, 2009, 02:48am EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
You should be able to see if all your memory sticks are at least being recognized by using a program such as CPU-z. Then check the SPD tab.

If your BIOS support advanced memory support, it may also have a means to interrogate slot physical population.

This could help you differentiate between an enablement vs. base functionality issue.

edit to add:
Also verify at POST your RAM total. You might also consider setting POST RAM test at "long" vs. "short"/"quick" until you get the issue resolved.

Michael C May 14, 2009, 09:52am EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
64-bit OS should be detectiing over 3.2gb ram right?

GtoX (capt Guns) May 14, 2009, 11:34am EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
all windows 32-bit versions (windows 7, XP, vista) i get 3.58gb of useable ram.. am i the only one experiencing this? this still happens after switching motherboards and other ram...

Main Rig--- 2700k @ 3.7ghz ,Scythe Samurai ZZ @ 54c load ASUS DCII GTX570 780mhz@64c load, P8P67-m Pro, 2x4gb xms3 1333mhz, 128gb SSD + 4x500gb lagring, OCZ Modxstream Pro 600watt, In-win Dragon Slayer 140mm+120+96mm,120mm
Michael C May 14, 2009, 11:49am EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
32 bit that is going to happen for sure, happens for me and everyone else. Only 64-bit operating systems support more than 3.2gb of usable ram.

G. G. May 14, 2009, 03:07pm EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
GtoX (capt Guns) said:
all windows 32-bit versions (windows 7, XP, vista) i get 3.58gb of useable ram.. am i the only one experiencing this? this still happens after switching motherboards and other ram...



Capt,

32bit will recognized up to 4gb of system memory.....


What happens is this..... your gpu memory is part of that total system memory, hence that is why you are only seeing 3.58gb of memory on any of those 32bit OS's. That missing amount of memory is due to your MSI 8800GTS 512mb memory taking up part of the total memory addressing...

Switch to 64bit OS and then you will be able to see all of your memory. If you have a total of 4gb of memory, you will see 4gb in My Computer properties. You will not see 4.5gb because the gpu memory is not shown/included in the display of total memory.

[edit to add]

Oh by the way.... if you are worrying about your 32-bit programs not working if you switch over to 64-bit OS..... ahh... no worries... I had the same concerns myself.. I made the switch and for "me", all the 32 bit programs that I use before the switch still works after the switch.

But one thing for sure though..... you need to find all the 64 bit drivers for your components if possible, especially video, motherboard, sound, lan, etc..... printers and peripherals not so much... they will still work with the original 32bit drivers.


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Michael C May 14, 2009, 03:31pm EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
On a Vista 32-bit SP1 you will see 4GB of ram wherever you look but it will only actually use 3.25gb of the ram. The rest is unaccounted for and unusable until upgrading to a 64-bit OS.

<a class= May 15, 2009, 01:36pm EDT Report Abuse
>> Re: Windows XP 64bit not recognizing above 3GB of RAM
Why bother with 32 bit windows? The 64 bit versions have pretty much all the drivers and can run most of the 32bit soft.

Plus why not just use linux? Ubuntu 32bit doesn't have those 4gb limits :)

Ubuntu+Xen+Windows XP/Vista = there ya go.

_______________________________________________________
3930K @ 5.00Ghz | GA-X79-UD3P | 16Gb DDR3 | GTX770 | W7 x64


 

    
 
 

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