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Difficulty: HardRAM Types and Characteristics

A senior field technician is reviewing system upgrade specifications across four distinct client deployments: a high-density database server requiring maximum memory capacity, a legacy low-power mobile terminal, a specialized healthcare workstation needing memory error detection without registered buffer latency, and a modern high-performance desktop workstation. Match each system deployment requirement to the corresponding RAM type or architectural characteristic.

  • An enterprise database server requiring memory modules that buffer both control/address lines and data lines to significantly decrease electrical loading on the memory controller.Load-Reduced DIMM (LRDIMM)
  • A legacy compact mobile terminal motherboard engineered specifically for 204-pin small-outline modules operating at a reduced voltage of 1.35V.DDR3L SODIMM
  • A specialized medical workstation requiring 288-pin DDR4 modules that correct single-bit memory errors while maintaining unbuffered low-latency access.Unbuffered ECC (ECC UDIMM)
  • A modern desktop workstation featuring 288-pin DDR5 modules operating at 1.1V with native internal bit-flip protection localized entirely to the memory chips.Standard DDR5 UDIMM with On-Die ECC (ODECC)

Answer

Enterprise database server with buffer chips on control and data lines maps to Load-Reduced DIMM (LRDIMM). Legacy compact mobile terminal requiring 204-pin 1.35V modules maps to DDR3L SODIMM. Medical workstation needing error correction without registered buffer latency maps to Unbuffered ECC (ECC UDIMM). Desktop workstation with 288-pin 1.1V DDR5 modules and internal bit-flip protection maps to Standard DDR5 UDIMM with On-Die ECC (ODECC).
The pairings correctly match each system scenario with its hardware specification: enterprise database memory buffering both command and data channels corresponds to Load-Reduced DIMM (LRDIMM); 204-pin 1.35V compact laptop memory corresponds to DDR3L SODIMM; low-latency unbuffered error-correcting memory corresponds to ECC UDIMM; and 288-pin 1.1V memory with localized DRAM bit protection corresponds to Standard DDR5 UDIMM with On-Die ECC (ODECC).

Step-by-Step Solution

1
Analyze the server buffer requirements
Memory buffering both control/address lines and data lines is uniquely characteristic of LRDIMM (Load-Reduced DIMM), which minimizes memory bus loading for maximum slot population.
Standard RDIMMs buffer only control and address lines, whereas LRDIMMs buffer both control and data paths.
2
Analyze physical form factor and voltage constraints for the legacy mobile terminal
A 204-pin small-outline module running at 1.35V identifies DDR3L SODIMM. DDR4 SODIMM uses 260 pins, DDR5 SODIMM uses 262 pins, and standard DDR3 operates at 1.5V.
Pin counts and operating voltages strictly differentiate RAM generations and form factors.
3
Evaluate workstation ECC requirements vs latency constraints
Single-bit error correction without registered buffering latency specifies Unbuffered ECC (ECC UDIMM).
ECC UDIMM provides error-correcting code functionality on standard unbuffered memory architectures.
4
Identify desktop DDR5 characteristics
Standard desktop DDR5 modules use 288 pins, run natively at 1.1V, and feature built-in On-Die ECC (ODECC) for localized DRAM cell integrity.
ODECC is an integral feature of the DDR5 specification designed to mitigate high-density chip error rates.

Key Concept

RAM Types, Form Factors, Voltages, and Architectural Characteristics
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Topics

RAM Types and Characteristics

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