ASUS ROG Strix SCAR 18 RAM XMP Profile Not Saving Windows 11

You enable XMP in the BIOS on your ASUS ROG Strix SCAR 18, save and exit, but after the next restart Windows Task Manager shows RAM running at the base DDR5-4800 speed instead of your XMP speed of 5600 or 6000 MHz. The BIOS does not persist the XMP setting across reboots.

This guide explains why XMP resets and how to make it stick on the ROG Strix SCAR 18 through BIOS settings, firmware updates, and Armoury Crate configuration.

“Enabled XMP on my SCAR 18 but after every restart RAM went back to 4800 MHz. Turns out there was a BIOS update from ASUS that fixed the XMP persistence bug.” – Farhan, PC enthusiast from Klang Valley

Why XMP Does Not Persist on ASUS ROG Strix SCAR 18

The ROG Strix SCAR 18 BIOS had a known firmware bug in versions before 314 where the XMP memory profile was cleared on power cycle (not just restart). ASUS released BIOS updates that fixed this. If your BIOS is older than version 314, the XMP reset is a firmware bug with a simple fix – update the BIOS.

• BIOS firmware bug before version 314 clears XMP on power cycle
• XMP saved but POST failure reverts to safe speed (4800 MHz base)
• BIOS update resets all settings including XMP to defaults
• Task Manager shows RAM at 4800 MHz instead of XMP 5600-6000 MHz

Fix 1 – Update ASUS BIOS to Latest Version

Open Armoury Crate and go to Update Center – BIOS Update. Download and install the latest BIOS version for ROG Strix SCAR 18 (G834 or G814 model). BIOS version 314 and later include the XMP persistence fix. The update process takes about 5 minutes and the laptop must be plugged in. After updating, re-enable XMP in Ai Tweaker as settings reset during BIOS update.

Fix 2 – Enable XMP in BIOS Ai Tweaker

Restart and press F2 repeatedly to enter BIOS. Press F7 for Advanced mode. Go to Ai Tweaker – AI Overclocking. Find Ai Overclocking Tuner and set it to XMP I (for rated speed) or XMP II (for higher binned speed). The current DRAM frequency should change to 5600 MHz or your kit rating. Press F10 to save and exit. Check Task Manager – Performance – Memory to confirm the new speed after Windows boots.

ASUS MemTest via Armoury Crate

If XMP enables but causes instability (BSOD, freeze), run ASUS MemTest available in Armoury Crate under Device – Memory Test. If errors occur at XMP speed, try XMP I instead of XMP II which uses more aggressive timings. Alternatively, manually set DRAM frequency in BIOS to one step below rated speed for better stability.

Fix 3 – Verify XMP Activation in Windows

After enabling XMP and booting to Windows, press Ctrl + Shift + Esc to open Task Manager, go to Performance – Memory. The Speed field should show your XMP rated speed (e.g., 5600 MHz or 6000 MHz). If it still shows 4800 MHz, enter BIOS again to confirm XMP is saved. Also check CPU-Z (free tool) for detailed memory timing information.

Fix 4 – Reset BIOS to Default Before Enabling XMP

If XMP enables and then resets after power cycle, try entering BIOS, pressing F9 to load optimized defaults, then immediately enabling XMP in Ai Tweaker before exiting with F10. This clears any conflicting settings left by previous configurations and gives XMP a clean starting state.

Frequently Asked Questions

Why is XMP profile not saving on ASUS ROG Strix SCAR 18?

A BIOS firmware bug in versions before 314 causes XMP to reset on power cycle. Update BIOS via Armoury Crate to fix this.

How do I enable XMP on ASUS ROG Strix SCAR 18?

Press F2 for BIOS, F7 for Advanced mode, go to Ai Tweaker, set Ai Overclocking Tuner to XMP I, save with F10.

What is the maximum RAM speed on ROG Strix SCAR 18?

Up to 5600 MHz via XMP I on Intel 13th Gen HX, with some kits and BIOS versions supporting XMP II up to 6000 MHz.

Does XMP affect warranty on ASUS ROG Strix SCAR 18?

No – ASUS explicitly supports XMP on ROG Strix SCAR 18 through the official BIOS Ai Tweaker menu.

Conclusion

RAM XMP not saving on ASUS ROG Strix SCAR 18 is caused by a BIOS firmware bug in versions before 314. Updating BIOS via Armoury Crate and re-enabling XMP I in Ai Tweaker is the complete fix. Task Manager Performance – Memory should confirm the correct XMP speed after a successful BIOS update and XMP enable sequence.