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Scar 18 2024 14900HX RTX-4080 Ram Upgrade - 64GB Kingston Fury 64GB kit

Marc89GTi
Level 8

I recently ordered a Kingston Fury 2x32 (64GB) kit for my Scar 18 2024 14900HX RTX-4080 laptop I just got recently. Someone posted about success with the KF556S40IBK2-64 64GB Kit.

Not too sure if the Scar 18 2024 supports XMP, from what I understand without this support of XMP the RAM will default to the JEDEC profile, running at DDR5-5600 with CL46 instead of its advertised CL40. Probably not a big deal in performance between CL40 vs CL46.

Curious if anyone can confirm if the Asus bios 320 will actually support the CL40 rating at the DDR5-5600?

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ElectroStingz
Level 11

Hello,

According to Kingston's tech sheet it's programmed with a default "Plug N Play" spec of  DDR5-5600 CL40-40-40 @ 1.1V.

Marc89GTi
Level 8

Just got it today, installed it and get Asus logo and that’s it, can’t even get into bios menu. Contacted tech support and they couldn’t help much. Put old stock memory in and it works again. Maybe it’s the fact this is ECC memory and technically the memory needs to be non-ecc memory, but unless someone has something to try will return it

The memory is non-ECC and what you are thinking about is something else to do with the DDR5 spec. All DDR5 memory chips have a form of error checking, known as on die ECC. Corsair have some info about this, https://www.corsair.com/uk/en/explorer/diy-builder/memory/is-ddr5-ecc-memory/?srsltid=AfmBOopc5dbSNQ...

Anyway, did you try 1 stick at a time to see what happens, maybe 1 stick is faulty?

I tried each stick and no luck, contacted Kingston memory today and did a memory learn procedure for 30 minutes and still no luck. Uncertain if this Asus Scar 18 (2024) doesn’t like CL40 clock speed but in theory it should just default to the system clock speed of CL46 or I have bad sticks?

Having 2 faulty sticks is unlikely so it may well be a compatibility issue with the low timings 😞 I was thinking about this kit too but the 32GB version.

What do ASUS Support have to say about this?

I was struggling to undo the battery connector to clear the CMOS that’s the only other thing I can try to see if it that helps get into special boot mode to recognize the memory?

@ElectroStingz Ok I was determined not to loose this battle, read the manual on how to disconnect battery (who knew lol) and success, took some time (2-3minutes) to let it figure out the Kingston Fury (memory training - almost thought it wasn't working) but I’m in windows and everything seems great.

Marc89GTi_0-1737149065042.jpeg

 

@ElectroStingz Ok extra bonus its running at CL40-40-40. Screenshot before and after, success 🙂

Screenshot 2025-01-17 133739.pngScreenshot 2025-01-13 193905.png

Nice one and thanks for the screenshots, I'll get the 2x16GB kit and give it a go :).