RIMM
System bus speed in microprocessors is the speed at which a processor sends/receives data from the motherboard's memory controller. It is also called the Front Side Bus (FSB) speed in the case of Intel CPUs.
This refers to the fact that the memory is not synchronized to the system clock. A memory access is begun, and a certain period of time later the memory value appears on the bus. The signals are not coordinated with the system clock at all.
address bus
Conventional DRAM, of the type that has been used in PCs since the original IBM PC days, is said to be asynchronous. This refers to the fact that the memory is not synchronized to the system clock. A memory access is begun, and a certain period of time later the memory value appears on the bus. The signals are not coordinated with the system clock at all, as described in the section discussing memory access. Asynchronous memory works fine in lower-speed memory bus systems but is not nearly as suitable for use in high-speed (>66 MHz) memory systems. A newer type of DRAM, called "synchronous DRAM" or "SDRAM", is synchronized to the system clock; all signals are tied to the clock so timing is much tighter and better controlled. This type of memory is much faster than asynchronous DRAM and can be used to improve the performance of the system. It is more suitable to the higher-speed memory systems of the newest PCs.
DRAM is a asynchronous,it does not synchronized with system bus
SDRAM or Synchronous dynamic random access memory is unique because it waits for a clock signal before it makes changes which means that is is synchronized with the system bus
SDRAM
The bus between the CPU and memory on the motherboard. Also called the memory bus, front-side bus, local bus, or host bus.
These are different and unrelated terms. SATA is a bus for connecting data storage devices to a motherboard. DDR is a type of memory.
The bus between the CPU and memory on the motherboard. Also called the memory bus, front-side bus, local bus, or host bus.
The memory bus consists of two main parts: the address bus and the data bus. The address bus transmits the addresses of memory locations, allowing the CPU to specify where data should be read from or written to. The data bus, on the other hand, carries the actual data being transferred between the CPU and memory. Together, these components facilitate communication between the processor and memory.
The bits of address bus inform the memory(Ram) which particular element is to be read or write in memory.