Samsung NP-X22 - Other Questions

172
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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