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Difficulty: Very hardRAM Types and Characteristics

Match each hardware memory requirement or scenario on the left with its corresponding RAM technical characteristic or installation specification on the right.

  • High-density DDR5 desktop UDIMM module installation288-pin form factor operating at 1.1V with onboard Power Management Integrated Circuit (PMIC) and dual 32-bit subchannels
  • DDR4 laptop memory module replacement requiring a 260-pin configurationStandard DDR4 SODIMM form factor operating at 1.2V with a specific notch keying distinct from DDR5 SODIMM
  • Enterprise database server memory upgrade requiring single-bit error correction and multi-bit detection72-bit bus width Registered ECC (RDIMM) module that reduces electrical loading on the memory controller
  • Optimal dual-channel memory configuration on a four-slot DDR4 desktop motherboardPopulating matching color-coded DIMM slots across independent channels using identical speed, capacity, and rank modules

Answer

High-density DDR5 desktop UDIMM module installation matches with 288-pin form factor operating at 1.1V with onboard PMIC; DDR4 laptop replacement matches with DDR4 SODIMM form factor operating at 1.2V with 260-pin layout; Enterprise database server upgrade matches with 72-bit bus width Registered ECC (RDIMM) module; Optimal dual-channel memory configuration matches with populating matching color-coded DIMM slots across independent channels.
Each RAM scenario strictly aligns with its physical specification and operational standard: DDR5 desktop modules introduce onboard PMIC power management at 1.1V over a 288-pin arrangement; DDR4 laptop modules use 260-pin SODIMM packages at 1.2V; mission-critical database servers require 72-bit bus Registered ECC (RDIMM) memory; and multi-channel architecture requires balanced population across separate motherboard channels.

Step-by-Step Solution

1
Analyze the voltage, pin count, and architectural changes introduced in DDR5 memory.
Identify that DDR5 desktop UDIMMs retain 288 pins but lower voltage to 1.1V, transfer power regulation to an onboard PMIC, and split the 64-bit channel into two 32-bit subchannels.
DDR5 architecture fundamentally shifts power management off the motherboard onto the module itself.
2
Differentiate laptop form factor pin counts between DDR4 and DDR5 memory generations.
DDR4 SODIMMs use 260 pins operating at 1.2V, whereas DDR5 SODIMMs use 262 pins.
Physical notch keying differs between RAM generations to prevent incorrect installation into incompatible slots.
3
Evaluate server-grade memory features required for data integrity and system stability under heavy load.
Identify ECC RDIMMs, which feature a 72-bit data bus (64 bits data + 8 bits parity) and an address/command register.
Registered RAM buffers control signals to reduce electrical loading on the memory controller, while ECC handles error detection and correction.
4
Determine motherboard multi-channel memory slot population rules.
Confirm that dual-channel functionality requires installing matched pairs of modules into designated matching slots (Channel A and Channel B).
Populating separate physical channels allows the memory controller to communicate with both modules simultaneously over a combined 128-bit bus width.

Key Concept

RAM specifications, form factors, pin counts, operational voltages, ECC server features, and channel architecture rules.
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Topics

RAM Types and Characteristics

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