S205 2gb instead 8 gb RAM problem

[Sinigami]

Hello,
I'v got Lenovo S205 E450 with 2gb RAM and upgrade them to 8gb (via Service Center)
I install windows 7 (x64).

And:
in BIOS I can see 8 gb
windows show 8gb but available only 2gb
BIOS - latestm  version from this site
no function remap memory or smth like this in BIOS

How can I make available all 8 gb? 
Thanks 

[Sinigami · Accepted solution]

Problem were solved easier then I thoughy)))
Just turn out limitation in msconfig))
 

[seahawk]

Sir, were you able to utilized the full 8gig ram memory?