Samsung R40plus - Other Questions

166
Q
4GB memory is not recognized by Windows
correctly.
A Thisisduetoalimitationin32bitoperatingsystemsthat
existsinnotebookcomputersofothermanufacturers.
Althoughtheaddressspaceofthe32bitoperatingsystem
is2³²=4294967296=4,096MB=4GB,allofitcannot
beallocatedtomemory,assomeofitneedstobeused
forotherpurposesbytheoperatingsystem.Because
approximately1GBofaddressspaceneedstobeallocated
toothersystemresourcessuchastheBIOS,PCIDevice,
andVGAforaPCtooperatenormally.Therefore,evenif
4GBofphysicalmemoryisinstalled,theaddressspace
allocatedtomemoryislimitedtoapproximately3GB.
 Althoughuserscanupgradetheirmemoryto3or4GB,
only3GBisrecognizedevenwhen4GBofmemory
isinstalled,andamemoryupgradeto4GBisnot
recommended.
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