A friend said:- I have a Gigabyte GA-K8N Pro Sli
This board came loaded with 4GB of ram and Win x64.
So I went to check the memory and it said 3.25GB.....where has the rest gone?
Windows site suggested the adding of /LARGEADDRESSAWARE in the boot.ini. After the reboot, this didn't help. This settings is more to do with virtual RAM.
I ran CPU-Z - it could see all the ram so it was definately there.
I upgraded the BIOS to the latest revision - nothing.
I noticed a few posts in this thread mentioning the memory hole - close, but on the G/B board this setting does not exist. Here comes the trick....
You need to enable the advanced settings in the BIOS before you can see the setting that is stopping the recognition of all the RAM. In the BIOS press CTRL + F1. This will let you get to the ADVANCED CHIPSET FEATURES. Go to the DRAM CONFIG. Set the H/W MEM Remap (4G RAM supp....to ENABLED.
Save and reboot..... end of message
PS: Sometimes a software conflict prevents your computer, or even CPU-z telling you the correct size of your memory. However, the BIOS does.