Currently I'm using Windows XP an a new PC with a Duo Core E6700 Intel and 2 GB Ram. I bought 2 more GB Ram with the intention to use 4 GB Ram, but that doesn't work. Apparently only 3 GB Ram are aloud with XP. I installed only 1GB, but the check-up shows only 2Gb. Is there any change to made in the Bios or elsewhere. Also, what is the difference between a 1GB DDRII 800MHZ  CL= 5-5-5-15 and CL=5-5-5-12?
It seems that my deal was not very useful until I use Vista (which i do not intend to do so far)
Thanks for any enlightenment in this matter
Anashwaran  

   I would think that the problem would be that your motherboard has limits on how much RAM you can have.  Or it could be that the RAM is defective.

Quoted from Ray    I would think that the problem would be that your motherboard has limits on how much RAM you can have.  Or it could be that the RAM is defective.

Dear Ray,
I checked the Bios and here it says : Memory 3072 MB, which seems to indicate that there are effectively 3GB installed. I have a completly new PC, latest model and motherboard, where you can install up to 8 GB. I also installed the new ones alone and they worked, so they are not defective. It only seems that this program didn't correctly check the memory installed.
Anyway, thanks
Anashwaran