Windows 7 64 maximum ram - Windows Help Zone.
Another big difference between 32-bit processors and 64-bit processors is the maximum amount of memory that is supported. 32-bit computers support a maximum of 4 GB (2 32 bytes) of memory, whereas 64-bit CPUs can address a theoretical maximum of 18 EB (2 64 bytes).
Answer to What is the maximum amount of memory a 64-bit version of Windows 7 Home Premium can support.
Required Minimum RAM for win 7. It actually requires 1 gigabyte RAM (32-bit) or 2 gigabyte RAM (64-bit). And aside from the RAM, you should also ensure that the processor is 1 gigahertz or faster 32-bit (x86) or 64-bit (x64). Check also that you have 16GB hard disk space available (32-bit) or 20 GB (64-bit). See to it that you have DirectX9 graphics device with WDDM 1.0 or a higher driver. So.
In theory this shouldn’t happen, since there isn’t a limitation in 64 bit Operation System to limit the memory to only 4GB. In fact, depending on what version of Windows 7 you are running, a 64 bit system can support up to 192GB of RAM (Windows 7 Home Premium supports 16 GB Max). But if you are one of those who is experiencing less useable memory than what you suppose to have there might.
The Windows 32-bit protected-mode cache driver (Vcache) determines the maximum cache size based on the amount of RAM that is present when Windows starts. Vcache then reserves enough memory.
RAM or 128 GB, whichever is smaller (address space is limited to 2 x RAM) Windows 8.1 and Windows Server 2012 R2: RAM or 16 TB, whichever is smaller (address space is limited to 2 x RAM). Windows Server 2008 R2, Windows 7 and Windows Server 2008: 75% of RAM up to a maximum of 128 GB Windows Vista: 40% of RAM up to a maximum of 128 GB.
WinRAR is a 64-bit Windows version of RAR Archiver.It can backup your data and reduce the size of email attachments, decompresses RAR, ZIP and other files downloaded from Internet and create new archives in RAR and ZIP file format. WinRAR's main features are very strong general and multimedia compression, solid compression, archive protection from damage, processing of ZIP and other non-RAR.