Asus TUF Gaming B650-Plus WiFi motherboard: After 1 year and half, won't post after a restart.

[vessils]

Hi, as the title suggests I've had my build for a year and half already (built it in October 2023), which is the following:

Mobo: Asus TUF Gaming B650-Plus WiFi 

CPU: AMD Ryzen 7 7800x3D

RAM: Corsair Vengeance RGB DDR5 32GB (2x16GB) 6000 MT/s (CMH32GX5M2B6000Z30K)

Storage: WD_BLACK SN850X NVMe SSD 2TB Internal SSD

Couple days ago I restarted my PC and noticed it was taking a while to post and the DRAM orange LED was on. I waited for a few more minutes since I know memory training can take a while to finish and nothing. Had to shut down the PC and boot it again only to find out that the issue persisted - no post, orange DRAM LED on. I tried the following already:

• I've removed the second RAM stick, left only one stick and installed it in every single slot (A1-A2-B1-B2), and in-between each stick's installation I cleared the CMOS - still didn't post.
• Done the same step above but with my other RAM stick, and still didn't post.
• Removed the battery for about 15 minutes - still nothing.
• Installed the lastest BIOS update for this mobo (Version 3222) - still nothing.
• Removed every peripheral and storage - at this point I only have the Motherboard + CPU + RAM + PSU - no post.
• Tried another PSU - still nothing.
• Tried reseating the CPU and had a visual inspection to both the CPU and the socket - both seem fine. Reinstalled them again and repeated the tests I described above and still no post.

So at this point I really don't know what to do. I haven't done anything unsual that could explain this behaviour, just restarted my PC after a few days of runtime (normally put my PC to sleep and wanted to do a clean boot).

Should I try another version of BIOS?

Any help is appreciated.

[gupsterg]

I doubt it's down to BIOS version.

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@vessils wrote:

• Removed every peripheral and storage - at this point I only have the Motherboard + CPU + RAM + PSU - no post.

 When you did above, what Q-LED did board get stuck at? did speaker make any beep codes?

[vessils]

So, after posting this I also remembered to connect a speaker to the mobo to see if I could hear any beeping codes - here's what I got: 

• With 1 of the dimms I got no beeping codes at all in any of the slots (tried them all).
• With the other one I got in every single slot 1 long beep + 2 short beeps ( which indicates a problem with the memory).

Basically there was no difference between the slots I installed the dimms in: one got no beeping and the other 1 long + 2 shorts

Now, it seems to be a memory issue, but it's really weird that both sticks just happened to die (one more than the other apparently) at the same time. Also no RGB is present on neither dimms, if that's helpful.

Also for reference, the DRAM light is instantly on when I turn on the system (never saw any other LED lit).

[Silent_Scone]

It won't be the DIMMs. Contact AMD support and see what they recommend.

[vessils]

AMD basicly recommends testing out with another RAM kit/Mobo to narrow down the problem - if not possible then RMA the CPU.

I'm gonna try with another RAM kit tomorrow and let you know how it goes, but its really weird that both dimms died at the same time (although in different way).

[vessils]

Ok, so I tried the original CPU in a new Motherboard / RAM Kit and got the following results:

• New Mobo + 1 new RAM Dimm + original CPU - Boots fine
• New Mobo + 1 original RAM Dimm + original CPU - No Boot (one dimm does no beep and the other 1 long + 2 short beeps - exacly like with the original motherboard)

Now, I discarded the CPU and the next step should be to test the new RAM in the original motherboard/CPU, but I'm kinda hesitant in doing so because I don't know if the motherboard could damage the new RAM kit. I'm saying this because its really unlikely both RAM dimms died simultaneously, and thus it could have been the motherboard that killed them (have no idea if this is true, just theorizing).

What do you guys think? 

Thank you for all the help so far.

[gupsterg]

I would say it's unknown if original motherboard has fault, leading to original RAM being faulty. So your choice if wish to try new RAM in original motherboard.

On DDR5 the DIMM PMIC creates the voltages used by DIMM. Look here, ignore the bit about 12V, as in non server it's 5V, see here.

It could well be RAM PMIC failed, I visit a few forums and read of some PMIC going faulty.

Just be aware I don't work for ASUS, I am just a meddling user 🙂 .

[vessils]

Thank you for the answer gupsterg - that does look like a plausible reason behind what happend to my system.

I currently have a ticket open with Asus and Corsair Support.

I won't close this thread just yet because I still want to post a resolution answer (for others in the future, if they encouter themselves with the same problems that I have).

[vessils · Accepted solution]

Ok, so I tried out the new RAM DIMMs with the original CPU on the original motherboard and it worked just fine.

I'm assuming the RAM died by itself, and could have been what @gupsterg explained, a failure of the PMIC.

Currently in talks with Corsair for RMA.

So yeh TL:DR - the RAM DIMMs were at fault.

Thank you everyoine for the answers.

[gupsterg]

Thanks for update 🙂 , hope RMA goes smooth 🙂 .