Difference between SIMM, DIMM, and RIMM

What is RIMM?

RIMM is designed to enhance data transfer rates and improve overall system performance. RIMM uses Rambus Dynamic Random-Access Memory (RDRAM), a form of memory technology that was designed to provide higher bandwidth for data transfer than the standard SDRAM (Synchronous Dynamic Random-Access Memory) and DDR SDRAM (Double Data Rate Synchronous Dynamic Random-Access Memory) that were commonly used in computers. It looks similar to DIMMs but comes in 184-pin configurations and offers options for both ECC (error-correcting code) support and non-ECC, with speeds reaching up to 800 MHz. These modules are especially found in Intel Pentium 4 motherboards. A unique feature of RIMM memory is that computers using it need a continuous signal to operate correctly....

Functions of RIMM

High-Speed Interface: RIMM/RDRAM was known for its high-speed data interface. It was initially introduced to provide applications requiring high bandwidth, such as 3D graphics and multimedia projects. Multitasking: RIMM modules enable multitasking capabilities in computer systems by allowing the Central Processing Unit(CPU) to quickly switch between different tasks and applications. This is achieved by providing fast access to data stored in memory. Increase System Performance: By providing fast access to data, RIMM modules contribute to overall system performance. They help reduce processing delays by ensuring that the CPU has quick access to the data it needs to execute instructions and run applications efficiently. Serial Data Transfer: Unlike traditional memory technologies that use a parallel data bus, RIMM/RDRAM uses a serial data bus. This means that data is transferred one bit at a time but at a much higher clock speed. High Bandwidth: RIMM modules provided high bandwidth due to the RDRAM technology they employed. This made them suitable for applications requiring high data processing and high-speed memory access....

Difference between SIMM, DIMM, and RIMM

Feature SIMM DIMM RIMM Memory Type DRAM, FPM, EDO SDRAM, DDR, DDR2, DDR3, DDR4, DDR5 RDRAM Pin Configuration Single-sided pins, pins on one side are connected to the pins on the opposite side Double-sided pins, pins on one side are independent from the pins on the opposite side Similar to DIMM in being double-sided, but specifically designed for RDRAM Voltage 5V (commonly) 3.3V, 2.5V, 1.8V, 1.2V (varies with DDR generation) 2.5V (typically for RDRAM) Speed Slower compared to DIMMs and RIMMs Faster than SIMMs due to technology advancements Designed for high-speed operation, faster in theory due to RDRAM technology Bandwidth Lower bandwidth Higher bandwidth improves with each DDR generation High bandwidth but was more niche due to RDRAM technology Physical Size Typically shorter and with fewer pins than DIMMs and RIMMs Larger than SIMMs, varying sizes and pin counts across generations Similar in size to DIMM but designed for RDRAM Use Case Older computers (1980s-90s) Modern computers, from the late 1990s to the present Was used in a niche market, primarily in some PCs and workstations around the late 1990s and early 2000s Compatibility Not compatible with DIMM or RIMM slots Not compatible with SIMM or RIMM slots Not compatible with SIMM or DIMM slots, requires motherboards specifically designed for RDRAM...

Frequently Asked Questions on RIMM – FAQs

Can RIMM be used on any computer?...