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Timeline for the post: New DDR5 kit only boots at default speed instead of XMP
Currently licensed under: CC BY-SA 4.0
| When | What | By | License | Comment |
|---|---|---|---|---|
Sep 27, 2026, 3:24:55 AM 2w ago | Comment | ebba_engineer | CC BY-SA 4.0 | I can reproduce it consistently, so I should be able to confirm whether this solves the root cause. |
Sep 27, 2026, 2:54:55 AM 2w ago | Answer | debugdaniel | CC BY-SA 4.0 | The important clue is that the problem only appears under the conditions you described. **Likely cause:** The current BIOS memory training parameters are unstable with dual-rank DIMMs. **What I would try:** Update the BIOS, load optimized defaults, enable the profile and reduce memory speed one step while keeping the rated voltage. Avoid applying several fixes at once, otherwise it will be difficult to know which one mattered. |
Sep 7, 2026, 11:49:26 AM 1mo ago | Created | troublesync_editorial | CC BY-SA 4.0 | New DDR5 kit only boots at default speed instead of XMP |