4 gb RAM on x64

[theedunk]

Hello everyone..im a newbie around here...
and my question would be...
Here's the situation...
i used win x64, 4 gig of RAM..why it isnt detected full 4 gig?
it detects only 3456 mb,why?
can anyone help me with this?...

 

[fullmetalvegan]

Which version of x64 Windows are you using? Are you sure it's a 64-bit operating system?

 

[theedunk]

yes im definitely sure its x64...profesional edition if im not mistaken
..when im using adobe after effects..on processing only detected 3.4 mb also

 

[usasma]

Does your BIOS indicate the full 4 gB?
Do you have a built in graphics card on your motherboard?

 

[Darth_Terra1]

looks like on board graphics allocating ram to me. what are your system specs ?

 

[theedunk]

my specs

intel processor 1.8 ghz
P5 LD2 SE
N6600 silencer
1 gig x 4 ram oh KINGSTON

and at BIOS only detect 3456 MB of RAM