Hello,
I have a ROG Strix Scar G634JZ (Core™ i9-13980HX, GeForce RTX™ 4080 Laptop GPU), which I upgraded the RAM from the 32GB Hynix to 64GB A-DATA.
Specs for the original and upgraded RAM are identical and at the upgrade (a year ago) no issues encountered, all was plug-and-play.
Well, since the last 2-3 versions of BIOS, after a BIOS update, the laptop does not boot (does not even get to POST), just turns the keyboard on for a few seconds, then off. Tried clearing CMOS via power button, removing the battery, trying one RAM at a time etc., to no avail.
So I send it to the Asus Service, having Premium Care paid for...and they return it saying "we can't do anything because you don't have the original RAM in it and yours is broken, according to our diagnostics program".
So I order a new set of A-DATA 64GB, try it, of course it doesn't work.
So I go on the "local eBay" looking for Hynix RAM to put it in and send to service again (I donated my original ones after the upgrade). Found a guy selling 8GB Hynix for 10 euros, I bite the bullet, put the stick in and...surprise, the laptop is booting fine!
I take the Hynix 8GB module out, put my RAM in, clean the CMOS and surprise...computer boots up fine and works as expected, passes all RAM stress testing and daily heavy usage.
There is no other way or combination that I can produce to make my laptop boot after a bios update, besides putting the Hynix RAM - booting - putting the upgraded RAM - clean CMOS procedure.
It seems to me that the motherboard does not "learn" the new ram after an upgrade and needs an "original Hynix" and a CMOS clear to...accept others?!
Any ideas why this happens and if there's a way to avoid doing the "RAM unlock" at each BIOS update?
Edited: the new RAM does not need a "clear CMOS" procedure, doing that will actually render the laptop unbootable again. It seems that it uses the "original" RAM to learn something, then it accepts the aftermarket RAM until the next BIOS update/CMOS clear.
