CompTIA Server+ (SK0-005)Server Hardware Installation and ManagementMedium
A technician is installing a new enterprise server that will host several virtual machines. The server's specifications indicate support for DDR5 ECC RDIMMs. What is the primary benefit of using RDIMMs over UDIMMs in this server environment?
- ALower power consumption.
- BFaster memory clock speeds (MHz).
- CIncreased total memory capacity and improved stability.
- DReduced cost per gigabyte of RAM.
Show answer & explanationAnswer & explanation
Correct answer: C. Increased total memory capacity and improved stability.
RDIMMs (Registered DIMMs) include a register that buffers electrical loads, which stabilizes the signals to the memory controller. This allows servers to support a much larger number of DIMMs and higher total memory capacities with greater stability, making them ideal for enterprise servers and virtualized environments where large amounts of reliable RAM are critical.
Why the other options are wrong
- A. RDIMMs typically consume slightly more power due to the register.
- B. RDIMMs can sometimes have slightly lower theoretical clock speeds compared to UDIMMs due to the buffering, but offer higher effective capacity.
- D. RDIMMs are generally more expensive than UDIMMs due to their added components and enterprise focus.
Registered DIMM (RDIMM)
A type of memory module used in servers that includes a register to buffer electrical loads, allowing for higher memory capacities and improved stability.
- Stabilizes electrical signals
- Enables higher total memory capacity
- Common in enterprise servers
Memory trick: RDIMM's registered, UDIMM is straight, LRDIMM loads spread, ECC keeps data great.