IncreaseUserVa can have a value ranging from 2048, the default, to 3072 (which matches the amount of memory configured by the /3gb boot option on Windows XP). This constrains the kernel to only 1 GB which may cause some drivers and/or services to fail.ģ2-bit applications built with the /LARGEADDRESSAWARE:YES linker flag on the 32-bit editions of Windows Vista, Windows Server 2008, and Windows 7 can address memory up to the number specified by the boot configuration data (BCD) element IncreaseUserVa. The first thing most developers notice is that 64-bit processors provide a huge leap in the amount of physical and virtual memory that can be addressed.ģ2-bit applications on 32-bit platforms can address up to 2 GB.ģ2-bit applications built with the /LARGEADDRESSAWARE:YES linker flag on 32-bit Windows XP or Windows Server 2003 with the special /3gb boot option can address up to 3 GB. Performance Implications of Running a 64-bit Operating System.Managed Code on a 64-bit Operating System.Profiling and Optimization of Ported Applications.Porting Applications to 64-Bit Platforms.Compatibility of 32-Bit Applications on 64-Bit Platforms.Specifying Large-Address-Aware When Building.Windows 11 is only available as a 64-bit or ARM64 edition. ![]() Windows Server 2008 R2 or later is only available as a 64-bit edition.
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