4 gb out of 6gb of my ram, it says "2gb system reserved" what does that mean?
KINGSTON HYPER X 6GB (3* 2GB) RAM
It means one of your three sticks has been determined by the BIOS to be 'bad' so the BIOS is Disabling one of the sticks to prevent errors.
I would re-seat all three sticks and test again and if that fails the simplest is to boot with (1) stick at a time to find the culprit and RMA the bad stick to Kingston.
CPU: | -- | 2GB | -- | -- | -- | -- |
Normal Resource Monitor looks like this (<50MB as Hardware Reserved):