Tuesday, September 8th 2026
Redditor's AMD Ryzen 9 9950X3D Reportedly Dies Shortly After Changing Motherboards
A Ryzen 9 9950X3D has reportedly died just an hour after being moved into an ASUS ROG Crosshair X670E Hero motherboard. According to Reddit user SpecialistConcept423, posting in r/GamersNexus, the chip had been running fine for about a year and a half in an ASRock X670E Taichi Carrara before the swap. After switching to the new board, no manual overclocking or voltage tweaks were applied; only one of the board's built-in memory presets was enabled for a set of SK hynix 6200 MHz modules. After saving that setting and rebooting, the board threw a "00" Q-Code and refused to post. Pulling the CPU and inspecting it revealed two brown marks on its contacts, which all but confirmed the catastrophic failure.
Things got stranger when the user resorted to an older Ryzen 5 8500G that had previously worked fine on the same board. That chip apparently now throws a "4D" code too, pointing at the motherboard itself as the culprit, not just the CPU. There's no confirmation yet on whether a faulty BIOS, a bad batch of boards, or something else is to blame, and ASUS hasn't commented on this specific case. It is worth noting that the ASUS board was not new, and it had undergone USB-related repairs and a BIOS rewrite. The user has since contacted AMD in Brazil for an RMA, but has shared no updates yet.Interestingly, this isn't the first CPU failure tied to this exact board either. We covered a Ryzen 7 7800X3D that swelled and burned on the same ROG Crosshair X670E Hero model just days ago, and last year ASRock also admitted that overly aggressive PBO current limits fried a wave of Ryzen 9000 chips on its own boards. It's too early to say if these share a root cause, but there is certainly a pattern here. In this particular case, the X670E Hero claimed not one but two CPUs, and it only needed a single setting change to do so.
Source:
Reddit
Things got stranger when the user resorted to an older Ryzen 5 8500G that had previously worked fine on the same board. That chip apparently now throws a "4D" code too, pointing at the motherboard itself as the culprit, not just the CPU. There's no confirmation yet on whether a faulty BIOS, a bad batch of boards, or something else is to blame, and ASUS hasn't commented on this specific case. It is worth noting that the ASUS board was not new, and it had undergone USB-related repairs and a BIOS rewrite. The user has since contacted AMD in Brazil for an RMA, but has shared no updates yet.Interestingly, this isn't the first CPU failure tied to this exact board either. We covered a Ryzen 7 7800X3D that swelled and burned on the same ROG Crosshair X670E Hero model just days ago, and last year ASRock also admitted that overly aggressive PBO current limits fried a wave of Ryzen 9000 chips on its own boards. It's too early to say if these share a root cause, but there is certainly a pattern here. In this particular case, the X670E Hero claimed not one but two CPUs, and it only needed a single setting change to do so.



207 Comments on Redditor's AMD Ryzen 9 9950X3D Reportedly Dies Shortly After Changing Motherboards
It’s not healthy to have your ego tied to a brand. Especially one as toxic as AMD.
Do you actually have something to say on topic? Maybe you know why the CPU died? Perhaps you were there and saw it happen?
But oh, right, only AMD can be toxic, glad we're back to this nonsense again. The irony of getting into an ego trip over a brand.
I plan on getting a Tachyon or Apex for my 9850X3D eventually, but it'll take a little time.
This is an AMD CPU defect problem, not a motherboard problem.
AMD has an issue with burning up CPUs. The sooner they - and their water carriers - admit it, the better.
Here's my board's data sheet:
So this person is an idiot and has no experience, so lets drop the topic now because reddit
Will you and that visible noise clown ever let off the personal attacks? Shall we discuss the topic instead? Please? :)
I couldn't imagine you ever in a debate, would say the other party was physically assaulting you because you don't like what they say?
Challenging someone's view points is not a personal attack, but it's amazing to see how people seem to think that's the case. Hey at least you didn't call me a clown
We are discussing the topic, melting CPU's now.......
Please don't derail this thread any further.
Let me tell some informations
First I bought the taichi carrara in December 2024 brand new with a 9950x who started to do some random erros in steam downloads, unrealistic temperature from ccds in idle (from -127°c tô 127°c) so I did a RMA around July 2025 (the exact same day when Switch 2 enter in pre sale)
The entire life of the 9950x3d was in no pbo settings and no xmp/expo, my ram sticks isn't in the qvl so used manual to 6000cl30 with 1.08v soc (2000mhz) in bios 3.50 (was the last one at that time), after updating to newer bioses when the ASRock reddit got many reports I was afraid of any issues so I went back to 3.50 until I started to get some weird issues:
My Lian Li Fans started to fail the LCD connection in internal USB hub
I lost Bluetooth or wifi sometimes after boot
Losing Ethernet connection/cable detection after opening game (random situations)
My aio at time was a thermaltake th420 ultra v2 and the screen went crazy too
Argb started to get buggy
So I decided to fix the hero board, the issue with the hero board was a USB and bios corruption, we did a complete repair, I tested it with a 8500g with last 3902 bios for 2 months before doing the swap from X670 ASRock to x670 Asus
The CPU booted okay, all drivers installed (didn't format) so I thought if I could try one ram preset from Rog profile
Im not newbie or newcomer in this scenario, i owned x79 rive, x370 hero, x99 deluxe (I had wr in cinebench r20 with 5930k) and x99 rampage v and many others setups
Instantly after I pressed the F10, the board didn't booted and only 00 appeared, I had this behavior before in x99 deluxe when she killed my first 5930k by overvoltage (known issue from x99 Asus boards) but I never had this issue with AMD before
Another thing I have to say is: the taichi board isn't even booting anymore, it's completely dead even without eps cable or CPU or other PSU (I tested both boards with other CPU, PSU and ram sticks)
I'm not blaming any brand, I just asked AMD for a RMA since if my CPU was dying from the first board, the Asus finished him, sadly I'm not going or planning to have a Am5 anymore and I bought a core ultra 7 270k plus witch a z890 Aorus Elite X Ice
If you guys have any questions feel free to reply
I liked this setup and the performance from Am5 but for work isn't reliable for me anymore, I'm product analyst, network analyst for the gaming industry
Greetings from Brazil