Windows 7 64-bit shows 3GB of ram instead of 4?

[jwwpua]

When I go to system properties, it displays 4.00 GB. However, when I go to task manager and then Performance, under Physical memory Total (MB) it shows 3006.

Am I reading this wrong?

 

[Hipcrostino]

you sure you installed 64-bit? looks like the results of 32. It is a beta, so perhaps its just reporting like a 32bit system instead of 64.

strange either way. Also check that the bios is reporting 4gb.

 

[jwwpua]

you sure you installed 64-bit? looks like the results of 32. It is a beta, so perhaps its just reporting like a 32bit system instead of 64.

strange either way. Also check that the bios is reporting 4gb.

Yep it's definitely 64-bit, says so in system properties

BIOS reports 4GB as well. I found some more information about it, here are some screenshots:

Anyone got explanations for this? Do I need to change options in the BIOS? I have the Asus P5B-E motherboard, if it matters.

Thanks

 

[Tweaked!]

Reboot once and see what your bios is reporting. My Asus p5b deluxe needed the bios flashed to a later revision when I upgraded to win7, cause I also added the extra ram to boost up to 4gb at the time of the switch to win7. I had the same scenario happening. The bios screen showed 3000mb, windows show same, and cpu-z saw all four sticks and reported 4gb. Once I flashed the bios, everything started reporting all 4gb.

 

[Hipcrostino]

interesting. It seems to be minusing the hardware reserved ram from the total avaliable. That is technically correct i believe. Thing is my comp reports my 2gb as all avaliable. perhaps google it and see what comes up.

A bios update sounds like a good idea too.

found an interesting comment here: http://www.sevenforums.com/news/269-windows-7-resource-monitor.html

 

[benbaked]

Is Windows 7 the first 64-bit OS you've used with 4 gigs of RAM on this computer? If so, look for a "memory mapping" setting in your BIOS and try changing it to the opposite of what it is currently set to.

 

[jwwpua]

Is Windows 7 the first 64-bit OS you've used with 4 gigs of RAM on this computer? If so, look for a "memory mapping" setting in your BIOS and try changing it to the opposite of what it is currently set to.

This worked! I flashed the BIOS to the latest and the BIOS read 3 GB, so I found the mapping setting and changed it (I think enabled it). Saved, went back in, and now it shows 4 GB. Booted into 7, also shows all 4 GB with only 2 MB hardware reserved.

Thanks to everyone for the help