B650E-I BIOS 3278 - EXPO instability with G.Skill DDR5-6000 CL32 (stable on prior BIOS)

[shamsrog]

I’m getting BSODs with EXPO memory profiles on my ROG STRIX B650E-I since updating to BIOS 3278. This configuration was completely stable with EXPO-II for over a year on at least four prior BIOS versions. I noticed another thread related to this, but it's been locked so I couldn't reply (the solutions proposed within did not work for me). Is there an upcoming BIOS or AGESA update that addresses the issues?

My system:

• Motherboard: ASUS ROG STRIX B650E-I
• CPU: AMD Ryzen 9 7950X3D
• Memory: G.Skill Flare X5 DDR5-6000 CL32 (F5-6000J3238F16GX2-FX5, 2×16 GB)
• GPU: NVIDIA RTX 4090 Founders Edition
• BIOS version: 3278 (AGESA 1.2.0.x)
• OS: Windows 11 Pro 24H2 (fully updated)

Problem:

• On BIOS 3278, enabling EXPO I, EXPO II, or EXPO Tweaked with my RAM kit causes:
• BSODs such as MEMORY_MANAGEMENT and IRQL_NOT_LESS_OR_EQUAL
• BIOS freezes on Save & Exit after changing RAM-related settings
• Cold boot instability (random failures during POST or into Windows)
• This happens at DDR5-6000 and even at DDR5-5800, despite passing stress tests like OCCT in Windows once booted.
• The same kit ran DDR5-6000 EXPO II flawlessly for over a year on older BIOS versions without any of these issues.

What I’ve tried:

• Voltage adjustments (VDD/VDDQ up to 1.37 V, SoC/VDDIO Mem within safe range)
• Lower memory speeds (DDR5-5800, DDR5-5600)
• Disabling Power Down Enable, forcing UCLK=MEMCLK, enabling/disabling Memory Context Restore
• Clearing CMOS and retesting from default settings
• Multiple clean Windows installations

[Momo_dk]

Welcome to the fun that is Agesa 1.2.0.3x / 32xx bioses. I'm in the same boat, my binned 6200 cl 32 had to be brought down to 6000 cl 30 under EXPO 1 and manual voltage for CLDO and VSOC with both Memory Context Restore and Quick Learn turned off. 

Surprisingly, AIDA says its performing better than older bioses versions, so I guess there was some truth to increased performance. That being said, it took a week and couple corrupted windows installs to get to stability. It seems trying to get UCLK=MEMCLK and Quick Learn + Memory Context to work in hand doesnt work for now..

[shamsrog]

Glad to know that I'm not alone, but also this isn't great.  I've seen the same MCR + UCLK issues. My system was 100% stable at DDR5-6000 EXPO II on older BIOSes but is unstable even at 5800 now. @Momo_dk can you share more about what you did? I'm curious if you've tried only disabling Quick Learn but keeping MCR on, or vice versa. I am trying to think if I should bother messing around or leave EXPO off until a future update can address the issues.

[Momo_dk]

The main thing I did was to turning off MCR and Quick Learn and applying 1.265v for vsoc and 1.1v for cldo. This seem to let expo 1 for 6000 work just fine for running UCLK=MEMCLK.

I would run OCCT for 30 mins on RAM, stop at any error.If passed, onto CPU+RAM for 30 mins. I know you're supposed to do longer, but I got impatient with spending days figuring out what's causing BSOD and/or application crashes in background. 

I have yet to start back down vsoc voltage or try see if I can push for 6200 expo 1 yet, but I'm almost certain its MCR/Quick Learn that causing most of my issues. 

FYI my kit is a Corsair Dominator 32gb x2. CMP64GX5M2B6000Z30 to be specific.

[Tiltmaster2000]

My MB is B650E-I GAMING WIFI (I guess its the same for all B650E-I ?)

I have the CORSAIR Vengeance DDR5 RAM 32GB (2x16GB) 6000MHz CL30-36-36-76 and my Expo I profile is also unstable since the BIOS update to 3278. I can boot up but once I play Battlefield 6 for example, the game just crashes/closes after 5-10 min. If I deactive it, everything works fine.

Before I updated I still had a BIOS version from 2024 and that EXPO profile worked perfectly fine. 

Can I manually adjust something in the AI tweaker so the EXPO profile works again? Is the voltage too low? Im somewhat of a noob on mem overclock.

[Silent_Scone]

Please list the actual kit PN

[Silent_Scone]

Within AMD Nitro settings, set 2/3/1.

See if this helps.

[shamsrog]

Thanks for the input everyone... sounds like this is affecting multiple kits (Corsair + G.Skill) on the B650E-I with BIOS 3278 / AGESA 1.2.0.3x.

From what I’m seeing:

• EXPO worked fine on older BIOS versions for multiple kits, but is unstable now.
• Disabling Memory Context Restore + Quick Learn, forcing UCLK=MEMCLK, and setting ~1.25–1.27 V SoC and 1.10 V CLDO seems to restore stability for some.

So this looks like a bug in how EXPO training works with 3278. Can someone from the ASUS team confirm if this is a known AGESA issue and whether a fix is planned in an upcoming BIOS?

[Momo_dk]

I wouldn't say UCLK=MEMCLK increases stability.. Maybe get 99% stability but once every 2 weeks, the memory training just go eh and the system super unstable (apps crashing left and right) until a restart. 

The bug really started with version 3222 and got worse with 3278 for my x670e-i. Last stable for me and my Corsair kit (6000mhz cl30  2x 64gb) was 3208 where I could go to EXPO I 6200 with FCLK 2166 along with primary and secondary timing tweaks. It's frustrating I can't go back to 3208 now that I've also upgraded to 9950x3d (thinking the IMC was fried in my 7800x3d, but noooo...)

[Silent_Scone]

Newer AGESA seems to have increased vSOC required for some OC looking at some reports. Seems to mainly affect 1:2. I wouldn't say it's a bug. 

Check AMD Nitro settings as suggested, or enable EXPO Tweaked if available.