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
Disagree on the availability of profiles being stupid, these are extremely useful to serve as a baseline for memory tweaking, as usual, the operator needs to RTFM and understand what they are doing. I was surprised even my Prime A620A has them, I thought these were usually reserved for the ROG Maximus and Crosshair motherboards. It's not a problem, most people will not activate these - and if EXPO is enough to cause this level of damage, then AMD needs to stop certifying EXPO kits that need VSOC adjustments (aka entirely discontinue and withdraw the ULL program and revoke EXPO certification for every kit rated above 5600 C36)What is there to disagree? It is common knowledge that the X670E and X870E are simply a dual chipset pair of Promontory 21 chips. There are no physical differences between X670E and X870E, however, AMD made it mandatory to include USB 4 support on X870E branded motherboards, which means that an USB chipset must be included (usually an AsMedia chip like the ASM4242), which results in a reduction of 4 lanes vs. what can be potentially available on a X670E motherboard.
There are too many variables between the kits themselves, imc/cpu quality, and cooling. Someone posted the perfect example of a 4800 profile that was on their ASUS bios that pumped 1.55vdd/vddq/vddio into the kit, which is quite frankly idiotic, especially if you dont have any idea what you’re doing. 1.55vddio is wildly high for 4800 let alone 6000/6200, and seeing as how one of the burned pad/pins was likely associated with vddio, absolutely brings into question what was set when the op just randomly chose to use one of the built in profiles on their board.
Moral being if you don’t have any idea what youre doing, enable expo and tune voltages downward while checking stability. Don’t randomly enable profiles never tested with your memory kit or cpu.
Entirely different scenario regarding unlocked cpus as there aren’t any built in OC profiles for CPU outside of using the dissimilar auto/ai OC tools.
Memory kits vary wildly with many layers of additional variables within timings on top of different ICs.
X670E is identical, except the USB 4 controller is not mandatory and can be vacant.
But that would deny them the income from the replacements of all those burned up cpus that they would be on the hook for replacing under warranty instead.
www.techpowerup.com/review/amd-ryzen-7-7700x/3.htmlWhat a surprise.OP successfully RMA'd her CPU. I'm sure AMD is making lots of profit from sending out a replacement for free (or a refund).
Why would you expect anything different? You must have very low expectations of who you give your money to.
If yes, that is a defective product.
You seem to have not read the second part of my post.
Derp.
How about a better example than the very stupid one you tried to counter with: My car will refuse to let me select a gear that will damage it. If I’m doing 90mph it’s impossible to shift into first gear - the gate is locked out.
You’re saying it’s okay to not have protections such as that. That’s fine that you have that opinion, but I call it a defective product. You don’t let people hurt themselves.
We won’t even talk about when AMD failed to put thermal protection in their CPUs.
Similarly, just because AMD gives you free control over your voltages, it doesn't mean you should set whatever stupid value comes out of your arse, or whatever some random bloke made up at your motherboard's design table, as it may or may not do good to your system.
Have you actually checked the overclocking page in any BIOS or GPU driver? Do you think the disclaimer is there for your entertainment? Overclocking is always done at the user's own risk, whether it's done with manual values or set profiles.
At least they accepted OP's RMA request, which I think is good. They could have easily gone down the "you overclocked at your own risk" route instead.My point stands. Just because you can, it doesn't always mean you should.
Does it suck? Sure. A lot, trust me.
Could there be some bugs in all AGESA versions? Absofuckinglutely.
AMD still has not gotten back to me about my RMA even after I inquired further.
But but.. I spent nearly 3K on their CPU's in the last 6 years and bought a lot of motherboards lol.. and that is what customer loyalty gets ya in 2026 :laugh:
I didn't say that.. just reminded me of that Asus guy lol..