About: 3 GB barrier

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In computing, the term 3 GB barrier refers to a limitation of some 32-bit operating systems running on x86 microprocessors. It prevents the operating systems from using all of 4 GiB (4 × 10243 bytes) of main memory. The exact barrier varies by motherboard and I/O device configuration, particularly the size of video RAM; it may be in the range of 2.75 GB to 3.5 GB. The barrier is not present with a 64-bit processor and 64-bit operating system, or with certain x86 hardware and an operating system such as Linux or certain versions of Windows Server and macOS that allow use of Physical Address Extension (PAE) mode on x86 to access more than 4 GiB of RAM.

Attributes	Values
rdfs:label	4-GB-Grenze (de) 3 GB barrier (en)
rdfs:comment	Die 4-GB-Grenze (auch 4-GiB-Grenze) bezeichnet die maximale Größe eines Adressraums (zum Beispiel des Arbeitsspeichers), der mit 32 Bit großen Adressen bei byteweiser Adressierung verwendet werden kann, zum Beispiel durch einen Prozess unter einem 32-Bit-Betriebssystem. Manche 32-Bit-Architekturen können mittels Segmentierungstechniken einen größeren Adressraum bereitstellen. (de) In computing, the term 3 GB barrier refers to a limitation of some 32-bit operating systems running on x86 microprocessors. It prevents the operating systems from using all of 4 GiB (4 × 10243 bytes) of main memory. The exact barrier varies by motherboard and I/O device configuration, particularly the size of video RAM; it may be in the range of 2.75 GB to 3.5 GB. The barrier is not present with a 64-bit processor and 64-bit operating system, or with certain x86 hardware and an operating system such as Linux or certain versions of Windows Server and macOS that allow use of Physical Address Extension (PAE) mode on x86 to access more than 4 GiB of RAM. (en)
dcterms:subject	Computer memory X86 architecture X86 memory management
Wikipage page ID	26465920 (xsd:integer)
Wikipage revision ID	1085747154 (xsd:integer)
Link from a Wikipage to another Wikipage	Protection ring NX bit MacBook Memory-mapped I/O User space Device driver Pentium Pro Protected mode Conventional PCI Gibibyte Conventional memory Linux Linux kernel MacOS Chipset Computer memory Computing PSE-36 Physical Address Extension 64-bit computing Windows Server Windows XP 32-bit 36-bit Accelerated Graphics Port Advanced Micro Devices Computer memory X86 architecture X86 memory management PCI Express Address line AMD K8 BIOS Microprocessor Operating system Word (computer architecture) X86 X86-64 Motherboard Virtual memory RAM drive Physical address Workaround PCI hole Video RAM
Link from a Wikipage to an external page	http://blog.superuser.com/2011/04/23/want-lots-of-ram-stop-using-32-bits/ http://www.jensscheffler.de/using-gavotte-ramdisk-in-windows-7
sameAs	3 GB barrier 3 GB barrier 3 GB barrier 3 GB barrier
dbp:wikiPageUsesTemplate	dbt:Citation_needed dbt:Main dbt:Reflist dbt:Short_description dbt:Use_dmy_dates
cs1-dates	y (en)
date	May 2019 (en)
has abstract	Die 4-GB-Grenze (auch 4-GiB-Grenze) bezeichnet die maximale Größe eines Adressraums (zum Beispiel des Arbeitsspeichers), der mit 32 Bit großen Adressen bei byteweiser Adressierung verwendet werden kann, zum Beispiel durch einen Prozess unter einem 32-Bit-Betriebssystem. Manche 32-Bit-Architekturen können mittels Segmentierungstechniken einen größeren Adressraum bereitstellen. (de) In computing, the term 3 GB barrier refers to a limitation of some 32-bit operating systems running on x86 microprocessors. It prevents the operating systems from using all of 4 GiB (4 × 10243 bytes) of main memory. The exact barrier varies by motherboard and I/O device configuration, particularly the size of video RAM; it may be in the range of 2.75 GB to 3.5 GB. The barrier is not present with a 64-bit processor and 64-bit operating system, or with certain x86 hardware and an operating system such as Linux or certain versions of Windows Server and macOS that allow use of Physical Address Extension (PAE) mode on x86 to access more than 4 GiB of RAM. Whatever the actual position of the "barrier", there is no code in operating system software nor any hardware architectural limit that directly imposes it. Rather, the "barrier" is the result of interactions between several aspects of both. (en)
gold:hypernym	Limitation
prov:wasDerivedFrom	wikipedia-en:3_GB_barrier?oldid=1085747154&ns=0
page length (characters) of wiki page	17304 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:3_GB_barrier
is rdfs:seeAlso of	RAM limit
is Link from a Wikipage to another Wikipage of	Memory-mapped I/O Conventional memory MacBook (2006–2012) PSE-36 Physical Address Extension 64-bit computing 2 GB limit List of RAM drive software PCI hole 3-GB barrier 3GB barrier 3 GiB barrier
is Wikipage redirect of	3-GB barrier 3GB barrier 3 GiB barrier
is foaf:primaryTopic of	wikipedia-en:3_GB_barrier

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