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20 Ιουλ 2022 · The x64 architecture can utilize a total of 2^64 bytes, equaling to 16 billion gigabytes (16 exabytes) of memory. The much greater resource utilization makes it suitable for powering supercomputers and machines that need access to vast resources.
The article talks about how the processor can reference (or address) the memory. In all modern architectures memory is byte-addressable, which means that every byte-sized memory cell has a number (its address), which the CPU uses to identify that cell.
25 Ιουλ 2010 · A 64-bit machine should be able to address up to 2 64 addressable units (in architectures designed over the last few decades, addressable units are invariably bytes, a.k.a. octets). If you define a "gigabyte" as 2 30 addressable units, then yes, 2 34 gigabytes would be another way to express the same count.
10 Ιουν 2024 · A 32-bit system can access 2 32 different memory addresses, i.e. 4 GB of RAM or physical memory ideally, it can access more than 4 GB of RAM also. A 64-bit system can access 2 64 different memory addresses, i.e. actually 18-quintillion bytes of RAM. In short, any amount of memory greater than 4 GB can be easily handled by it.
19 Μαρ 2015 · In short, Windows uses LLP64, meaning that long long and pointers are 64 bit, while Linux uses LP64, where long is 64 bit as well. Other architectures might make int or even short 64 bit as well, but these are quite uncommon. float and double should remain the same in size in all cases.
28 Ιουν 2024 · To increase the size of user space, use BCDEdit /set increaseuserva. In 64-bit Windows, the theoretical amount of virtual address space is 2^64 bytes (16 exabytes), but only a small portion of the 16-exabyte range is actually used. Code running in user mode can access user space but not system space.
Help you learn about: The memory / storage hierarchy. Locality and caching. Virtual memory. How the hardware and OS give application programs the illusion of a large, contiguous, private address space. Virtual memory is one of the most important concepts in system programming.
