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DDR5 Memory won't go past 4000mhz to reach 4800mhz on Z690-F

Kravena
Level 7
Just put together a Z690-F (Bios 0702), 12900k and 4 x 8gb Crucial ( CT2K8G48C40U5 ).

Memory isn't listed on the QVL, just to get that out of the way.

It all works, but if I set the MB to XMP I to enable 4800mhz, the motherboard will not post. When it does eventually boot, the memory drops to 4000mhz and not the 4800mhz on the XMP I.

Anyone else getting similar issues ?
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40 REPLIES 40

Braegnok wrote:
Best reason why not to go with 4x16GB DDR5,.. would be currently there is no solid BIOS/Microcode for running 4x16GB DDR5 on your motherboard past 4000MHz.

Perhaps down the road when DDR5 4x16GB kits are more mainstream, testing will be done and new BIOS/Microcode will be released.

As of today I have only seen one DDR5 4x16GB kit for sale : https://www.newegg.com/zvvn-64gb-288-pin-ddr5-sdram/p/0RN-00ZC-000W6?quicklink=true

,.. and that kit today would most likely run at 4000MHz on your motherboard.

Current DDR5 Memory Support: "If the motherboard has two slots total, than the maximum support is DDR5-4800 in any configuration. If the motherboard has four memory slots total, than the maximum support is DDR5-4400 when two slots are filled with any memory.
If all four memory slots are filled, single rank memory will support up to DDR5-4000.
If all four memory slots are filled, dual-rank memory will support up to DDR5-3600."

DDR5 Memory Varies with Number of Modules: https://www.anandtech.com/show/16959/intel-innovation-alder-lake-november-4th/4


Ok. Still not sure I want to mess with anything. Also, I am running 2 different 2X16GB kits. One is the Corsair and one is the Kingston. The Kingston is on the board compatibility list. Both are 5200MHz and look like they have the same timing. I ordered the Kingston because at first I thought the Corsair kit was bad. In the end, it was the MB. I decided to keep both and as I said before I don't really want to tempt fate with messing with memory again. I did manually set the memory to 5200MHz in the bios but didn't change anything else and it passed the memtest and so far hasn't given me any bluescreens or any other issues. I did look at the 2x32GB kit you mentioned but I don't see it for sale anywhere

Braegnok
Level 14
The Dell Hynix modules are sold per module, direct from Dell: https://www.dell.com/en-us/work/shop/dell-memory-upgrade-32gb-2rx8-ddr5-udimm-4800mhz/apd/ab883075/m...

The Corsair Micron modules are sold in a kit of two modules, direct from Corsair: https://www.corsair.com/us/en/Categories/Products/Memory/DOMINATOR-PLATINUM-RGB-DDR5-Memory---Black/...

Braegnok wrote:
The Dell Hynix modules are sold per module, direct from Dell: https://www.dell.com/en-us/work/shop/dell-memory-upgrade-32gb-2rx8-ddr5-udimm-4800mhz/apd/ab883075/m...

The Corsair Micron modules are sold in a kit of two modules, direct from Corsair: https://www.corsair.com/us/en/Categories/Products/Memory/DOMINATOR-PLATINUM-RGB-DDR5-Memory---Black/...


Looking at the memory support page for my board the only 2x32GB kits that are listed are CMT64GX5M2X5200C38 and CMK64GX5M2A4400C36. The CMT64GX5M2X5200C38 looks like it isn't available.

birdjungle wrote:
Looking at the memory support page for my board the only 2x32GB kits that are listed are CMT64GX5M2X5200C38 and CMK64GX5M2A4400C36. The CMT64GX5M2X5200C38 looks like it isn't available.


Page 8 of your motherboard memory QVL shows all three 8GB, 16GB, and 32GB Dell 4800 modules, they are listed as Venders: SK Hynix.

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Braegnok wrote:
Page 8 of your motherboard memory QVL shows all three 8GB, 16GB, and 32GB Dell 4800 modules, they are listed as Venders: SK Hynix.

92331

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This is what I see when I go to my boards memory compatibility list.

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birdjungle wrote:
This is what I see when I go to my boards memory compatibility list.

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Try this Memory QVL Support Link for your board : https://rog.asus.com/us/motherboards/rog-strix/rog-strix-z690-e-gaming-wifi-model/helpdesk_qvl_memor...

Looks like the link your on is wacked, thare should be like 10-pages of memory in your QVL. :cool:

Braegnok wrote:
Try this Memory QVL Support Link for your board : https://rog.asus.com/us/motherboards/rog-strix/rog-strix-z690-e-gaming-wifi-model/helpdesk_qvl_memor...

Looks like the link your on is wacked, thare should be like 10-pages of memory in your QVL. :cool:


I think the disconnect is that I chose 2x32GB under size. But if I unselect that I see 4 pages worth

Hi guys, i have a question. i have a z690-a prime and 2 8gb crucial rams at 4800. if i put the sticks at recommended slots(A2 B2) every thing is fine and i can run them at full speed (4800mh) but if i put those 2 sticks in A1 B1 slots the speed is limited to 4000mhz. Is this how these new motherboards build?

This worked for me:

ddr5 dimm XMP fix (especially for 4 dims):
VDD = 1.300
VDDQ = 1.300
PMIC voltages = By Per PMIC
https://www.youtube.com/watch?v=1KZFeE-o3jo


Note: Your CPU overclock also may play apart in stability as it did me, I did not win the CPU lottery (SP= 88) so I overclocked manually all core 5ghz, 51x4,52x2 core, vcore 1.328 with 0.100 negative offset combined with the above for my corsair dominators CL40 (2x32). = stable and temps are bellow 87 under load and cinebench (realtime) score = 28140

Hope this helps someone.

pedrooo wrote:
Hi guys, i have a question. i have a z690-a prime and 2 8gb crucial rams at 4800. if i put the sticks at recommended slots(A2 B2) every thing is fine and i can run them at full speed (4800mh) but if i put those 2 sticks in A1 B1 slots the speed is limited to 4000mhz. Is this how these new motherboards build?


Stick to the slots as allocated in the manual to utilise the correct number of channels/speed. There are reasons at an electrical level why these are the preferred slots.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090