AM5 DDR5 RAM timings you can move into BIOS line by line.

This page focuses on four cards: Safe, Optimal, Extreme, and Buildzoid. Pick one and read the BIOS sheet directly without digging through extra commentary.

Browse presets Stability guide

Preset board

Select a preset and read the BIOS sheet

Four AM5 presets with timings, voltages, clocks, and Nitro values.

Manufacturer
Capacity

BIOS Aliases

Different boards use different names

  • "CPU VDDIO" may appear as "CPU VDDIO / MC" or "VDDIO/MC". Some boards may label it "CPU VDDIO MEM" or something similar.
  • "Memory Context Restore" may appear as "MCR".
  • "Gear Down Mode" may appear as "GDM".
  • "Nitro" may appear as "DDR5 Nitro Mode" with "RX / RX / CL" and burst settings below it.

Scope

What the presets actually target

  • The presets are AM5-first and designed around common DDR5 tuning patterns.
  • "Safe", "Optimal", and "Extreme" fit Hynix A-die or M-die kits best.
  • The Buildzoid card is the broader AM5 baseline preset.
  • If your kit is not close to that shape, use the page as a starting map, not a promise.

Layout

Why the sheet is split by category

  • The sheet separates always-on toggles, voltages, clocks, Nitro, and timings.
  • That makes BIOS entry faster because related settings stay grouped together.
  • Where a preset does not define every possible field, the page keeps the sheet simple instead of padding it with commentary.
  • The goal is fast reading, not documentation density.

Validation

Don’t trust a warm reboot

  • Guide order: OCCT memory first, then TM5, then long VT3 or similar.
  • Cold boot regularly. AM5 can look stable after a reboot and fail after power-off.
  • Keep DIMM temperatures under 50°C once refresh and clocks get tight.
  • With GDM Off, you may need more voltage or less aggressive SCL values.