ASUS's new DIMM Fit feature can provide additional stability when pushing DRAM overclocking to the edge by fine-tuning key parameters.
What do you need to do?
It's important to tune the system to the best of your ability before moving forward with DIMM Fit once you have exhausted timings, ODT settings and voltages, etc.
When can I use DIMM Fit?
Firstly, it’s important to talk about what DIMM Fit can’t do. Whilst these types of fine-tuning adjustments to improve signal margin can yield benefits, they won’t perform miracles. There is only so much margin in the circuit, and the system needs to have a certain level of stability for there to be an improvement. For example, you have a set of XMP modules validated for 7200MT, but the system won’t post at 9000MT. DIMM Fit isn’t going to help the DIMMs or CPU run exorbitantly higher frequencies. As nice as that would be, we’re always limited to the margins of each component.
The ideal situation for DIMM Fit is after you've already conducted some fine-tuning. For instance, if the system can train successfully, there may still be some errors in memory stress tests.
Once you've exhausted voltage and ODT tuning, and done everything within your ability, you can leave DIMM Fit running overnight.
Valid Example:
8000MT is passing POST stress tests successfully, but memory stress tests such as HCI Memtest Pro are throwing an error into coverage.
Valid Example 2:
8000MT is stable in HCI Memtest Pro, but 8200MT won't POST. Running DIMM Fit may provide more stability margin at 8200MT.
Invalid Example:
7200MT XMP memory kit is stable at POST and during memory stress tests, but 9000MT won't POST.
DIMM Fit Store
DIMM Fit allows you to store up to three profiles. Store 0, Store 1, and Store 2.
You can select or delete any of these at any time.
Can you tune a Store Point further?
Yes! If for example Store 0 is stable, you can run DIMM Fit again as many times as you wish to see if the results improve.
How do I make sure I don’t lose my DIMM Fit profiles?
Much like saving BIOS CMO files, you can save the currently selected Store point to USB, as well as load existing Store points from USB.
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