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Vista Doesnt detect all installed RAM

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zidane_rm_5   08-03-2007 at 04:17:56 PM

Hi all i just installed Vista on my machine, and i have 4x1GB
RAm installed on my motherboard, but when i logon to vista, it is only
show that i have 2GB of RAM while i have 4GB installed on my system. Anyone have any idea about that?

------------------------------ Best regards
Zidane_RM_5

 

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spuddyt   08-04-2007 at 02:49:42 AM
- 0 +

have you tried running the memtest in built into vista (i have no idea if that would help but hey it might)

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Jackanapes   08-04-2007 at 09:35:35 AM
- 0 +

There is a known problem with this

look here: http://support.microsoft.com/kb/929580/en-us

Reply to Jackanapes
dengamle   08-04-2007 at 10:54:44 AM
- 0 +

you might have memory remap activated in your bios. disable it, and you should see more, but not all of it

Reply to dengamle
jeditim   08-09-2007 at 02:49:55 PM
- 0 +

You show that you are running XP Pro...is it 32bit or 64 bit. A 32 bit system can only access somewhere between 2.8 to 3.5 Gb of RAM by design...depending on your other hardware (video card.)

I have Vista 32bit with 4Gb of RAM installed and am able to access 3.58Gb of RAM.
Tim

------------------------------ Gigabyte - GA-P35-DQ6 | C2D E6600 | Corsair 520W PS | 4Gb (2 x 2Gb) Corsair DDR2 800; 5-5-5-18 | Gigabyte 8600GT |
Seagate 500Gb 16mb SATA2 x2 | LineOn SATA DVD | Cooler Master UFO CPU Cooler | Windows Ultimate 32 bit | NEC 2070 LCD
 Reply to jeditim
Wispi   08-09-2007 at 02:56:05 PM
- 0 +

32-bit operating systems can only address 4G. This 4G includes 256M reserved for system use plus whatever amount of VRAM your video card has. So, if you have a video card with 512M of RAM, then you will only be able to use 3.2G of RAM for your applications and games.

When I use a 32-bit operating system on my computer, I only have 2.2G RAM for use with applications and games (4G - (256M + 768M + 768M)) since I have two video cards with 768M VRAM in SLI.

When I switched to 64-bit Vista, I now have 4G available for applications and games. But, since the 64-bit drivers for my XFi card and my 8800 video cards are not stable, I am switching back to 32-bit Vista.

Hopefully, in the near future, I will be able to switch back to 64-bit.


Message edited by Wispi on 08-09-2007 at 02:57:41 PM
------------------------------ 2xEVGA 8800 GTX KO ACS3 (SLI)
EVGA nForce 680i-A1 (P30)
Intel QX6800 (2.93GHz)
Laing, TDX 775, BI Xtreme
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