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02-13-2020 01:54 AM - edited 02-13-2020 02:04 AM
Non-ECC RAM stopped working after update BIOS to P61 v2.41. BIOS beeps 3 long + 2 short.
Clearing CMOS did not help. Downgrading to original version is not possible due to firmware is missing on the web-site. The same issue with version 2.40.
RAM is HX421C14FB/16
ECC memory m393a2k40cb2-ctd7q works well.
Solved! Go to Solution.
02-23-2020 07:54 PM - edited 02-23-2020 07:55 PM
A better question would be "why did you use memory that was specifically contrary to HP recommendations for your very valuable and fast workstation?". BIOS updates recently have dealt with some very important security risks that Intel/HP have worked together closely on, to protect these workstations. If you don't know about that then it is time to get your google going.
I continue to recommend updating BIOS in the safest way possible... update from within BIOS. I wish HP would get on this bandwagon.... it is already built in, it works reliably, and it is the safest way to go. The HP perspective may be that it is just one layer too deep. I don't think so.
02-23-2020 08:30 PM
If the memory was supported by that particular cpu before, a bios update shouldn't have killed it. That's unnecessary crippling. Like the incorrect 'only ecc udimms' requirement for the z420. I wish I would have known it could take rdimms years ago as I have a pile of them here. They can even use lrdimms to max out at 256GB of ram--4x what HP says it can do.