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64bit os and 16gig mobo wont go past 3.25 ram?

Last response: in Motherboards
October 15, 2008 2:44:59 PM

I have xp 64bit os a gigabyte mobo that expands up to 16 gigs of ram and It wont go past 3.25 ram. I have checked the bios but there is no memory remapping option even if I check the advanced options. What is going on?
a b V Motherboard
October 15, 2008 3:04:35 PM

How do you know that it's only showing 3.25 GB of RAM? Where are you getting the info?

I have XP x64 and have 4GB installed, and it all shows.

Give us some other specs and maybe we can help out some more.

October 15, 2008 3:24:27 PM

It shows it in the computer properties and in detection tools used for games like rainbow six vegas 2
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October 15, 2008 3:36:15 PM

two 1gig sticks, one 2gig stick all at 667, a 9600gt 512, 5400+ dual core, ga-m57sli-s4 mobo, 800watt psu
October 15, 2008 3:38:09 PM

Read your motherboard's manual to find out how they call the memory remap feature and where you can find it, sometimes it's called different.
October 15, 2008 3:42:31 PM

You just have 4 gigs installed in your system 1 + 1 + 2 = 4.

the 16gigs is the max capacity of the mobo. He's not going to show how RAM you can put but only the amount installed.

If you really have a 64bit OS, you should see 4gigs.
October 15, 2008 3:42:55 PM

forum trouble, double post...
October 15, 2008 5:28:17 PM

The op isn't looking for 16GB to be seen by Windows, he wants to know why Windows is only seeing 3.25GB. Probably the memory Remap function metioned by icyicy.
October 15, 2008 8:15:45 PM

I have 4 gigs installed but it only reads 3.25 I'll check the manual again to see if there is a memory remap or similar option. I have another 1gig stick that I put in to see if that would change anything and it didn't.
October 16, 2008 1:37:03 PM

i have to ctrl+f1 to get advanced chipset options, ddr2 ram config, but it only lets me change the memory clock and the speed
October 16, 2008 2:37:03 PM

So how's it going? You find the setting? Or do you still need help?
October 16, 2008 2:38:31 PM

I still need help
October 17, 2008 12:13:32 PM

October 18, 2008 6:31:31 AM

Can't we get this person some help here? We have a lot of experts around. I'm out of ideas but I can't believe everyone on these Forums is!
a b V Motherboard
October 18, 2008 10:43:29 AM

Jwyouth said:
two 1gig sticks, one 2gig stick all at 667, a 9600gt 512, 5400+ dual core, ga-m57sli-s4 mobo, 800watt psu

Could be a BIOS glitch, check for a newer BIOS depending on the board revision:

Rev. 1.0 and 1.1 use the same BIOS

Rev. 2.0 uses a different BIOS

Although the AMD64 memory controller is flexible enough to run an odd-ball memory configuration like you have (single channel mode only), it does pose more work for BIOS programmers beyond the more common and recommended memory configurations. Because it poses more work, odd-ball memory configurations tend to be a weak spot in BIOS programming. If a BIOS update doesn't solve it (or you already have the latest BIOS), find another 2GB module to test so that each channel is matched.
February 3, 2009 11:43:05 PM

Try installing Vista Ultimate 64bit or other different version of 64bit windows and see if there is a difference.. if you have no budget for it, just download it online. I had the same problem with a client computer and i resolved it by this procedure easily, but im not sure why its like that though..
February 6, 2009 10:41:54 PM

Try swapping the 2gig stick for 2x1gig sticks,it may be because your only using 3 lanes and not 4.
a c 177 V Motherboard
February 7, 2009 12:10:53 AM

No - swap the 2x1 modules for another (manufacturer matched) 1x2; 4x1 is notorious for problems, much easier to get 2x2 or 4x2 running well...
a c 177 V Motherboard
February 7, 2009 12:15:32 AM

BTW - Xp64 seems to be Microsoft's 'red-haired bastard child' - I run a development system with all four OSs - Vx86 & Vx64, Xpx86 & Xpx64 - I try to do similar installs on all; been my experience that if something's gonna cough up blood, it's gonna happen on Xp64; am pretty close to dumping it, and wiping the partition for a beta Win7, just for kicks, as I can see no good reason for its existence...