July 16, 20241 yr Hey everyone! My server has been running great on an AsRock Rack X470D4U2-2T and a 3900X. Several dockers, VMs, and all the good stuff. Microcenter was selling the 5950X for under $400 and I just couldn't resist. Everything boots up fine, but shortly after I start up the array everything crashes so hard the IPMI interface bricks. I put the 3900X back in, and everything is fine. Does this sound like a bad CPU, or maybe something in a configuration I'm missing. I upgraded from a 2700 to the 3900 and don't remember having to deal with hard crashes.
July 16, 20241 yr You on the latest bios? Have adequate CPU cooling? All the supplemental CPU power on the motherboard attached? Have you reset bios to defaults? It sounds a bit like overheating or power instability but that's wild guessing. It could also easily be overclocking settings not quite sitting right with the new CPU if you did any of that.
July 16, 20241 yr Author @_cjd_ I'm fairly positive it isn't overheating. Digging down the rabbit hole I did find some new beta bios' which I'm going to try. Also, a couple of reports of adding stability by de-clocking the ram. My concern was not knowing if I should be looking at Unraid configuration or hardware.....but it's seeming to be hardware. I'll keep ya posted.
July 16, 20241 yr Unless it's set to xmp speeds I'd be surprised to see ram an issue. If it is xmp, it's technically overclocked, certainly not default settings. Assuming a good CPU, heat, insufficient power, or a timing/clock related setting mismatch are the most likely issues that come to mind. When you swapped back to the 3900 was the thermal paste coverage good? What cooler are you using? The new CPU runs hotter and demands more power. Heck, just check all the power supply connections to be sure they're seated, maybe reseat just to be sure. And make sure that supplemental power is a full 8 pins. Speaking of reseating, try that with ram as well just to be sure. If you have more than one stick, you could try dropping to one at a time... I'd be really surprised to see this be unraid related -unless a VM starts immediately which causes issues over drivers or something. I bounced between incredibly different hardware setups early on getting everything sorted and no issues.
July 18, 20241 yr Author @_cjd_ While scouring the ever dying internet, I found a gentleman who installed 5 5950Xs into 5 Asrock rack mobos. He was having the exact issues I was, and it seemed to be an issue with the memory controller. I got more stability by turning the RAM clocks to 800mhz per his write up, but still not perfect. Seems to be the 5950X just not liking the ECC memory. And if I wanted it to be stable I would need to give up ECC, throw my memory clocks into the toilet, or go to just 2 sticks and cut my capacity way down (64 gigs to 32). None of those seem like an even tradeoff for the extra cores.
July 18, 20241 yr That's unfortunate! If you have any non-ECC to test it might be worth it just to be sure. That's well into unusual interactions but glad you found more info. Makes me wonder if it's just the 5950 or also the 5900 - and/or just on the x470 (I have an x570d4u with 32gb ECC at xmp/3200 and a 5600x - stable as can be. I also don't need more cores)
June 10, 20251 yr Hate to necro and old thread, but I’m having stability issues with a 5950X and ECC memory. Were you able to resolve this?
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