ASUS P5B-deluxe; 6 GB RAM Installed, only Available 5GB ???

Hello,

ASUS P5B-deluxe mainboard
6 GB RAM Installed , only Available 5GB?
2x - Kingston KVR667D2N5/2G
2x - Kingston KVR667D2N5/1G

After installing 1Gb; 2GB; 1 GB and 2GB (total 6GB)
The system tells me 6GB memory is installed
However only 5GB memory is available, usable.

What am I doing wrong?

Please help.
Regards, JS
3 answers Last reply
More about asus deluxe installed
  1. Pull all the RAM out an boot the PC on 1 stick at a time. Start with the 1GB sticks. Once finished put all the RAM back and boot. If it still fails go get memtest 86 and test your 1GB sticks.

    http://www.memtest86.com/
  2. What do you mean by "only 5GB memory is available", how do you know that?
  3. Running a P5B Deluxe here too w/8GB. You must enable memory remapping in the BIOS to use all of your RAM.
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