Turn a full timing string (CL-tRCD-tRP-tRAS) at any speed into real nanoseconds for every primary timing.
Updated 11 Nov 2026 · 2 min read
Quick answer
Every timing on a RAM kit is a cycle count. This calculator converts the four primary timings to nanoseconds at your kit’s speed, so you can compare full profiles — not just the CAS number on the box.
RAM Timing Calculator
Turn a full timing string (CL-tRCD-tRP-tRAS) at any speed into real nanoseconds for every primary timing.
The four primary timings
- tCL (CAS): delay from read command to data — the headline number.
- tRCD: row activation to column access delay.
- tRP: time to close a row and open the next.
- tRAS: minimum time a row must stay open.
Kits advertised as ‘6000 CL30’ might be 30-36-36-76 or 30-38-38-96 — the full string separates them. See CL30 vs CL36 for why it matters.
Frequently asked questions
Which timing matters most after CAS?
tRCD has the next-biggest effect on real latency-sensitive performance; tRAS mostly matters at its floor (it should be at least tCL + tRCD in theory).
Can I tighten timings manually?
Yes, in small steps with stability testing after each change — and gains are modest. The calculator tells you what a target string is worth in ns before you bother.