I update BIOS 1704 for my ROG Z790 Dark Hero, lot stable but unable to use XMP at all

[okezz]

update: 26/10/2024
Despite all the tuning and adjustments, my PC still randomly crashes to a black screen; sometimes it lasts for a day, other times it may happen again the next day or after three days. This occurs randomly, whether the PC is idle, under light activity, or during gaming. The worst part is when I'm working on important projects and suddenly, my PC goes black, forcing a restart and causing all my unsaved work to be lost. 

recently I posted my issue with Rog Maximus Dark Hero that often crash with intel i9-14900K

ROG MAXIMUS Z790 DARK HERO + Intel Core i9-14900K ... - Republic of Gamers Forum - 1048556

Previously, I updated my BIOS to version 1602 Beta (0x12B). Despite my efforts to stabilize it, the system was only stable for a week before it began to crash repeatedly.

I noticed a new BIOS update, version 1704 Beta (0x12B), and proceeded with the update. It has been considerably more stable, but I am unable to modify or use the X.M.P profile. If I switch to X.M.P I, II, or Tweaked, my PC fails to boot and automatically reverts to safe mode, forcing me to disable X.M.P.

Currently, my PC is running without X.M.P at 4000MT/s, although my RAM is a Corsair DOMINATOR® TITANIUM RGB 48GB (2x24GB) DDR5 DRAM capable of 7200MT/s CL36.

My PC details.

• Mobo: ROG Maximus Z790 Dark Hero with latest BIOS (1602 Beta)
• CPU: Intel i9-14900K
• RAM: Corsair DOMINATOR® TITANIUM RGB 48GB (2x24GB) DDR5 DRAM 7200MT/s CL36
• GPU: ASUS TUF Gaming GeForce RTX™ 4070 Ti SUPER 16GB GDDR6X OC
• 1x GIGABYTE AORUS GEN5 NVME M.2 PCIE 2280 SSD 1TB AG510K1TB
• 3x FanXiang S880 PCIe 4.0 NVMe M.2 SSD
• PSU: MaxTytan 1250Watt 80 PLUS Titanium Fully Modular
• OS: Windows 10 Latest Update (Win11 is giving more problem)

[Nate152]

Hello okezz

It sounds like your pc is on the edge of stability with your mighty fast memory kit. The higher the frequency you go, it's more of a crapshoot that X.M.P. will work. In most cases, the instability comes from the cpu's memory controller.

So, since you seem to be on the edge of stability, a slight bump in some voltages may get you fully stable.

There are five voltages that will help stabilize your high speed DDR5 memory, these are found on the Ai Tweaker page in the bios.

1) Dram VDD voltage

2) Dram VDDQ voltage

3) CPU System Agent voltage

Under Advanced Memory voltages:

4) IVR Transmitter VDDQ voltage

5) Memory Controller voltage

Check what these voltages are set to, I'm sure you have some headroom to get you fully stable.

[okezz]

I switched from the Asus OC auto profile to the Intel Profile with extreme settings, keeping everything else at default. I managed to use the XMP I profile at 6800MT, but I'm uncertain about its longevity. So far, my PC has not crashed.

This BIOS update causes the PC to crash frequently and randomly when using the Asus AI profile. Additionally, the previous BIOS version 1602 was causing browsers (Chromium Base) to display error pages.

[Silent_Scone]

Test stability with a dedicated RAM Stresser such as Karhu Ramtest or HCI Memtest Pro

[LX_x]

And on my BIOS it heavily underclocks my 14900KS when using AI Overclock compared to the 1602 version… Telling the CPU to downclock on all cores at just 50c…

[LX_x]

To x57 multiplier at 50c is too much, before it stayed at x59 default clock!

[okezz]

does your PC stable before? no crash? what about now

[LX_x]

Before the update the chip ran amazingly. After the update the BIOS wanted to tell me that I got a 14900k. No crashes before and after, but I lost performance.

[okezz]

what is your setting in bios?

[LX_x]

after some tuning I got x60 allcore and per-core overclock up to x62 running with a slight undervolt by -0.025. LLC 6 and auto voltage. Way better than the 1602 AI overclock aswell. But i don't know why the 1704 AI overclock wants to underclock it so far when it can clearly run at much higher clocks...