220-801 · Question #195
A technician is building a custom gaming computer. Which of the following is the FASTEST memory the technician can use?
The correct answer is B. DDR3 CAS9. CAS latency (CL) measures how many clock cycles it takes to access a column of data - lower is faster. DDR3 operates at significantly higher clock speeds than DDR2, so even though DDR3 CAS9 has a higher CAS number than DDR2 CAS7, the actual latency in nanoseconds is lower for…
Question
A technician is building a custom gaming computer. Which of the following is the FASTEST memory the technician can use?
Options
- ADDR2 CAS7
- BDDR3 CAS9
- CDDR3 CAS10
- DDDR3 CAS11
How the community answered
(43 responses)- A2% (1)
- B81% (35)
- C5% (2)
- D12% (5)
Explanation
CAS latency (CL) measures how many clock cycles it takes to access a column of data - lower is faster. DDR3 operates at significantly higher clock speeds than DDR2, so even though DDR3 CAS9 has a higher CAS number than DDR2 CAS7, the actual latency in nanoseconds is lower for DDR3 CAS9 (e.g., ~11ns vs ~17ns). Among the four choices, DDR3 CAS9 combines a newer, faster generation with the lowest CAS latency of the DDR3 options listed, making it the fastest overall.
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