RAM Installation help!

Hi guys, recently I purchased three 1 gig sticks of DDRII Ram, rated at 667mhz. When I bought the computer a month ago it came with 1 gig already. I installed one gig last week, which the computer detected. I just installed the other 2 gigs and booted up. The computer only recognised 3.5gb. Can't understand because motherboard supports up to 4gb of DDRII 533/667/800 MHz SDRAM and has DUAL CHANNEL SUPPORT ON FOUR DIMMS. I'm running Vista and have a Nvidia Geforce 8800GTS 320mb and an AMD Athlon X2 64 3800+ Dual core.

If anyone can help I would be most grateful

 regards

gerard

You are also running only a 32bit OS and therefore can only use at a maximum 3gig on XP and because your on Vista it must be 3.5gig for Vista. If you want to have access to all 4gig of ram then you will have to upgrade to the 64bit version which then has its downfall of incompatability its up to you but thats how it is.

ah ok cool, what are people suppose to do who want to run games that use direct x 10 fully maxed. Crysis will need a huge amount of Ram to run fully maxxed, how does one get around it?gerard-williams

Yeah I understand that, thats because there are more bytes, 1mb =1024kb or 1,048,576 bytes. There is a gap in the actual Memory detected on the system! I thought that Vista 32bit could support 4gb. I guess I'll have to get the 64bit version. gerard-williams

I just rang microsoft, they said vista 32bit edition supports up to 4gb of RAM, why doesnt my computer register the 4gb?gerard-williams

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