1. What is RAM Latency?

RAM latency refers to the time delay between when a command is entered and when the data is available. It's typically measured in nanoseconds (ns) and is calculated using the CAS latency and RAM frequency.

2. How Does the Calculator Work?

The calculator uses the RAM latency equation:

Where:

• \( CAS \) — Column Address Strobe latency (clock cycles)
• \( Frequency \) — RAM operating frequency in MHz

Explanation: The equation converts clock cycles to time by accounting for the RAM's clock speed. Lower latency means faster response time.

3. Importance of RAM Latency

Details: RAM latency affects system performance, particularly in memory-intensive applications. Lower latency can improve overall system responsiveness and performance in gaming and professional applications.

4. Using the Calculator

Tips: Enter CAS latency (usually listed as CL in RAM specs) and RAM frequency (in MHz). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good RAM latency value?
A: Lower is better. Typical DDR4 latency ranges from 10-20ns. High-performance RAM might be under 10ns.

Q2: Does frequency or CAS latency matter more?
A: Both matter, but the relationship is complex. Higher frequency with higher CAS might perform similarly to lower frequency with lower CAS.

Q3: How does DDR affect latency calculations?
A: DDR (Double Data Rate) transfers data on both clock edges, but latency is still calculated using the base clock frequency.

Q4: Can I compare RAM kits using just latency?
A: While important, also consider capacity, frequency, and bandwidth for complete comparison.

Q5: Why does my RAM show different frequency in BIOS?
A: RAM often runs at base speed until XMP/DOCP profile is enabled to reach advertised speeds.