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DIMM in socket D1 no longer shows in SPD list (Asus X99-A USB 3.1 + Core i7-6900K)


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Asus X99-A USB 3.1 / BIOS 3101

Intel 6900K

G Skill F4-3200C14-8GVR

Windows 10 Pro 64-bit


Hi Fiery,


Since the last two betas the DIMM in socket D1 no longer shows in the SPD device list, A1, B1 and C1 show fine. Going back to the stable 3900 D1 shows again.


Let me know what you need. Thanks!



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If it's possible, please right-click on the bottom status bar of AIDA64 main window --> Sensor Debug --> SMBus Dump (Full). Copy-paste the full results into this topic, or attach the results as a TXT file to your post. You may need to enable status bar in AIDA64 / main menu / View first.

Please do that for both the latest beta (3916) and the latest stable build (3900).

What we've done since Build 3900 is increased the timeout value for the IMC of your processor. In theory that would help about slow SPD devices, and it shouldn't cause any more troubles than before. It shouldn't make any SPD devices disappear :) However, previously we've already seen a few examples of X99 motherboards where the IMC had issues talking to the memory modules populated on the last (4th) memory channel. The last memory module (e.g. DIMM-D1) appeared in the list of SPD devices, but there were reading errors in the SPD block and that caused various issues about detection. For example, memory module part number was read incorrectly, or some of the timings were off. It would be important to check whether DIMM-D1 SPD block can be read without errors on your system, using Build 3900.



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