Ram frenquency issue

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   Hi everybody,

i have an issue with the ram frenquency, i can't use the xmp profile at the full speed of my ram (or to o.c.) with win 10, i can use max 2400mhz otherwise i can't boot in to windows. But with linux i can use it even to oc 2800/3000.

Might it depends by the driver?

this is my build:
Asrock Fatal1ty AB350 Gaming-ITXac

Thermaltake Smart SE 530W

AMD Ryzen 5 2400G

G.Skill 8GB DDR4-2666 (2x4)

SSD Drevo D1 m2
BIOS 4.51

thanks

Edited by alek - 13 Mar 2018 at 5:32pm

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alek Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Mar 2018 Status: Offline Points: 7	Post Options Post Reply Quote alek Report Post Thanks(0) Quote Reply Topic: Ram frenquency issue Posted: 13 Mar 2018 at 5:25pm
	Hi everybody, i have an issue with the ram frenquency, i can't use the xmp profile at the full speed of my ram (or to o.c.) with win 10, i can use max 2400mhz otherwise i can't boot in to windows. But with linux i can use it even to oc 2800/3000. Might it depends by the driver? this is my build: Asrock Fatal1ty AB350 Gaming-ITXac Thermaltake Smart SE 530W AMD Ryzen 5 2400G G.Skill 8GB DDR4-2666 (2x4) SSD Drevo D1 m2 BIOS 4.51 thanks Edited by alek - 13 Mar 2018 at 5:32pm

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 13 Mar 2018 at 5:55pm
	What you see, my guess, is in the different ways/terms the BIOS passe off EFI data to/between Windows and Mint. And then in turn what each OS does with said data. You say MAX 2400 yet in the middle pic above it is running at it's rated 2666. "Configured Clock Speed: 1333 MHz Your Kits PN is F4-2666C15D-8GVR https://www.gskill.com/en/product/f4-2666c15d-8gvr

alek Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Mar 2018 Status: Offline Points: 7	Post Options Post Reply Quote alek Report Post Thanks(0) Quote Reply Posted: 13 Mar 2018 at 6:28pm
	Yes max 2400 with windows 10. On linux i can use it up to 3000mhz without problems. Yes that is my kit thanks

JohnM Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 Feb 2018 Location: UK Status: Offline Points: 267	Post Options Post Reply Quote JohnM Report Post Thanks(0) Quote Reply Posted: 13 Mar 2018 at 11:02pm
	It doesn't answer your question but I notice that there are no G.Skill DDR4-2666 kits on the QVL, at all. There's a gap between 2400 and 2933 on both the generic Ryzen QVL and the specific Raven Ridge QVL. Is there a difference between the way you're booting Windows and Linux - is one using UEFI boot and the other legacy, perhaps? FWIW, I'm using Corsair DDR4-2666 (which is on the QVL) with the same board, BIOS and processor at 2933 with Windows 10 UEFI boot, simply by setting the RAM speed in the XMP menu with everything else at stock. How exactly is Windows failing when you set the higher speed?
	ASRock Fatal1ty AB350 ITX P4.90, AMD Ryzen 5 2400G, 2x8GB Corsair CMK16GX4M2A2666C16, 250GB Samsung 960EVO, 500GB Samsung 850EVO, 4TB WD Blue, Windows 10 Pro 64, Corsair SF450, Cooler Master Elite 110

alek Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Mar 2018 Status: Offline Points: 7	Post Options Post Reply Quote alek Report Post Thanks(0) Quote Reply Posted: 13 Mar 2018 at 11:22pm
	Thank you, you are right this RAM kit is not on the QVL but why it works fine at 2133/2400 and not on 2666mhz??? I'm booting Win10 with UEFI and Mint with a live distro on a USB drive. On windows i can start up the system till the logon screen then when i try to insert the pw, win falls down with a black screen. i've noticed also something else (not sure i might be wrong): before installing the AMD drivers i could use Windows with the XMP profile setted to 2666. it's a strange thing... Edited by alek - 14 Mar 2018 at 12:39am