ASRock Timing Configurator is a free Windows utility primarily intended for detailed inspection of memory timings on Intel platforms. It shows frequency and Command Rate, the full set of primary/secondary/tertiary timings (tCL, tRCD, tRP, tRAS, tCWL, tRFC, tREFI, tRDRD/tWRWR groups, etc.), as well as trained RTL/IOL values per channel — information that is often unavailable from BIOS or other monitoring tools. Historically, ATC has been used as read-only, but in a number of 3.x builds it’s possible to change a subset of timings from within Windows (this also works on some Chinese X99 boards); on most other boards and/or versions, the utility remains view-only. Any changes made from the OS, when available, are applied on the fly and do not persist across reboots, and attempts to tighten timings too aggressively often lead to instability or BSODs.
If your board supports editing in 3.x, proceed in small steps, log your changes, and be ready to roll back via a reboot; for stable operation it’s preferable to make final adjustments in BIOS.
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Typically it’s better to try the 3.x branch on X99 and 4.x on Z270/Z370/Z390/X299 and newer chipsets; if you see N/A or empty fields, switch between 3.x and 4.x. Works on Windows 7/8.1/10. On Windows 11 you may need to disable driver signature enforcement.
📥 Asrock Timing Configurator v3.0.5 (~2.6 MB)
📥 Asrock Timing Configurator v3.0.6 (~2.6 MB)
📥 Asrock Timing Configurator v4.0.14 (~3.0 MB)
