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An address bus is a bus that is used to specify a physical address. When a processor or DMA-enabled device needs to read or write to a memory location, it specifies that memory location on the address bus (the value to be read or written is sent on the data bus). The width of the address bus determines the amount of memory a system can address.
Bus width may refer to: Bus § Dimensions, the width of the road vehicle; Bus width, in computer architecture, the amount of data that can be accessed or transmitted ...
DIMM modules connect to the computer via a 64-bit-wide interface. Some other computer architectures use different modules with a different bus width. In a single-channel configuration, only one module at a time can transfer information to the CPU.
Memory bus (interface) width: Each DDR, DDR2, or DDR3 memory interface is 64 bits wide. Those 64 bits are sometimes referred to as a "line." Those 64 bits are sometimes referred to as a "line." Number of interfaces : Modern personal computers typically use two memory interfaces ( dual-channel mode) for an effective 128-bit bus width.
On Zen 2 and Zen 3 CPUs, the IF bus is on a separate clock, either in a 1:1 or a 2:1 ratio to the DRAM clock. This avoids a limitation on desktop platforms where maximum DRAM speeds were in practice limited by the IF speed. The bus width has also been doubled. [11]
A n as in A16, A24, A32 refers to the width of the address On the VME bus, all transfers are DMA and every card is a master or slave. In most bus standards, there is a considerable amount of complexity added in order to support various transfer types and master/slave selection.
The reduced bus width is compensated by a doubled minimum burst length of 16, which preserves the minimum access size of 64 bytes, which matches the cache line size used by modern x86 microprocessors. [17] DDR5 also decreased the refresh rate to 32 ms from 64 ms when operating above 85°C. It also provides two refresh commands: REFab and REFsb.
The PCI-X standard was developed jointly by IBM, HP, and Compaq and submitted for approval in 1998. It was an effort to codify proprietary server extensions to the PCI local bus to address several shortcomings in PCI, and increase performance of high bandwidth devices, such as Gigabit Ethernet, Fibre Channel, and Ultra3 SCSI cards, and allow processors to be interconnected in clusters.