since 0x129 microcode BIOS update: not stable with XMPII RAM profiles (PRIME95)

[Gurgeh]

This is more for general community awareness rather than engaging in fault finding but:

Since applying 0x129 microcode BIOS update 2503 08/08/2024) for ROG Z790E Gaming WiFi (1st edition) with intel 13900K Then with all loaded optimised defaults + XMPII profile (Corsair CMH32GX5M2B6400C36 , 2x16GB sticks) , PRIME 95 blend tests fails very easily/quickly. NB: It has been about a year since I last ran these, but I was thorough back then.

All defaults (no XMP) seems stable running for about 20mins far.

Comments welcome. Speculation welcome. Fix suggestions welcome also (I've not got a clue how to approach RAM config timing issues, however, I may not be doing any testing any time soon)

I'm happy to provide more info and answers questions as and when I can though.

[Hopper64]

It would be better to run one kit as per the link provided.

[AMD180]

Hi guys,

Currently having this issue after updating the 1503 Bios (non BETA) with Z790 Apex Encore

I had been running my G.Skill 8400 kit @ 8200mhz via XMP1 with absolutely no problems , and after the BIOS update the board will not post with XMP enabled AT ALL.

Had no problems at all with 1402 bios, system was completely stable with the XMP1 enabled and th ram set to 8200mhz.

Is anyone else having this issue with their Z790 Apex Encore board after updating to 1503 bios?

Looking for a solution from ASUS as soon as possible, this BIOS has turned this board from the greatest Z790 board to an average board that doesn't OC at all anymore.

[TIGGO]

These were the settings I had to revert to. This made my machine stable.

Performance Preferences [ASUS Advanced OC Profile]
Ai Overclock Tuner [XMP II]
XMP [DDR5-6600 32-39-39-76-2N-1.40V-1.40V]
BCLK Frequency [100.0000]
PCIE Frequency [100.0000]
Intel(R) Adaptive Boost Technology [Auto]
ASUS MultiCore Enhancement [Auto – Let BIOS Optimize]
SVID Behavior [Auto]
BCLK Frequency : DRAM Frequency Ratio [Auto]
Memory Controller : DRAM Frequency Ratio [Auto]
DRAM Frequency [DDR5-6600MHz]

Also,

High DRAM Voltage Mode [Auto]
DRAM VDD Voltage [1.40000]
DRAM VDDQ Voltage [1.40000]
IVR Transmitter VDDQ Voltage [Auto]
Memory Controller Voltage [Auto]
MC Voltage Calculation Voltage Base [Auto]
VDD Calculation Voltage Base [Auto]
PMIC Voltages [Sync All PMICs]
SPD HUB VLDO (1.8V) [Auto]
SPD HUB VDDIO (1.0V) [Auto]
DRAM VDD Voltage [1.40000]
DRAM VDDQ Voltage [1.40000]
DRAM VPP Voltage [1.80000]
DRAM VDD Switching Frequency [Auto]
DRAM VDDQ Switching Frequency [Auto]
DRAM VPP Switching Frequency [Auto]
DRAM Current Capability [Auto]

These were some of the differences compared to Intel's Default Extreme that was unstable for me.

[AMD180]

Thanks Tiggo, I have put in the above config & have managed to get it to boot at 6400Mhz XMP1, but getting blue screens occasionally. Still a long shot from where it used to boot at 8200mhz

I'm really not sure what to do from here other than report the issue and hope it is fixed in the next BIOS update?

[Silent_Scone]

A lot of users seem to be combining memory kits in here. Please make sure you're only using one memory kit if asking for assistance. 

https://rog-forum.asus.com/t5/technologies-explained/memory-kits-overclocking-and-what-you-may-not-k...

[TIGGO]

My Ram is 2x32 Gb's. Not mixed.

[FluFFhead310]

updated ASUS Prime Z790M-PLUS D4 motherboard to BIOS 1663. after the update enabling the XMP profile crashes (BSOD) my system almost immediately upon startup. disabling XMP keeps it stable. 

CPU: Intel Core i7-13700K
RAM: G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin PC RAM DDR4 4400 (PC4 35200) Intel XMP 2.0 Desktop Memory Model F4-4400C17D-32GVK

[TIGGO]

Yep, mine is still unstable. Computer shuts down randomly and reboots when it wants. May have to start the RMA process. Trying the Intel Default, Extreme, Enforce all Limits, and XMP tweaker settings.

[JGdaCaesar]

Just drop the speed slightly and it will become steady or increase the ram voltage

[TIGGO]

So you are saying choose XMP II but down below change the RAM speed to something that is highlighted with a lower speed?