Windows 7 - 4GB of RAM installed only showing 3GB

Hey, im running 64bit build 7000 and when i boot my BIOS message says i only have 3B of ram installed out of 4GB. Is anyone else having this problem? It says under system properties i have 4GB installed though. Which one is right?

Well, if its your BIOS than it should have nothing to do with your operating system. I would say the latter is right, since Windows x64 accepts the full capacity of ram.

Hello Adan,

You might see if after resetting your BIOS settings back to default, it may show all 4GB.

Is your RAM sticks all of the same type, timings, and voltage requirements?

I'm having the same problem here. Installed W7100 x64, but in my controll panel/system it shows
"Installed memory (RAM): 4.0GB (3.0GB usable)"

When first installing the 64bit Vista there were certain errors seen there where you were advised to remove all but 2gb. That's still a little odd since all 4gb are seen in the two x64 installs.

The 32bit side sees 3.581gb available out of the 4 total as expected here. Loading the defaults and a possible need for a bios update would be the things to look at there. An update may have a fix for a problem unless the brand of memory is a problem. Some boards get touchy on brands for various reasons.

has everyone checked the BIOS for the ''memory remap'' feature, make sure this is enabled.......






SK

Sorry Skunksmash, could you explain how to check the "memory remap" please?

there should be an option on more modern boards called ''memory remap'', this locks out the RAM thats needed by the system so it cant be used, disabling it will make it open to universal use... its not much, but it all adds up

your boards may not support this feature, but if it does it will be hidden in the ''advanced options'' somewhere..... just make sure its enabled & you can eliminate this as an issue....





SK

There's also the option to enable PAE or the Physical Address Extension. Physical Address Extension (Windows)

For 7 as well as Vista the BCD edit is needed for this. Build6000.com - How To: Enabling PAE on 32-bit Windows Vista

But would PAE not be automatically enabled in 64bit W7?
I had PAE enabled when I was still on Vista 32, made no difference, also only saw 3.2G