So I had my gigabyte z390 pro wifi that was running for over a year suddenly stop detecting my 9900k and my 9700k. So a bit of time goes by and I buy a used MSI z390-A pro for 75$ mostly to see if my CPUs aren't dead and I quickly confirmed they both work and have been tweaking in the bios a bit with my 9900k and just playing some games and benchmarking...mostly benchmarking as motivation for anything lately is scarce. But just running aida64 , cinebench mixed with 3dmark, the usual for OCing and stability testing.
A week of testing my nice patriot viper 4400cl19 kit I was getting about 36ns of latency and about 62,000 MBs read, write speed in aida64 running 4200cl16-16-16-36 at 1.5v vDim with the CPU @ 5ghz 1.36v with 1.2 vccsa and 1.1v vccio and with my loop being a 420mm not having a issue cooling my delidded 9900k and my shunt modded Titan X pascal in the past and temps were never above mid high 80C in benching and only hitting 75is in game when my water was 30C-35C on a bad day during gameplay.
So I wont keep rambling about details but I decided to try this option in the bios called "memory try it" or something like that and it erases my vDim ,vccsa and vccio and set them to 1.6vdim(which is fine I guess) BUT 1.4v on the others! So I give up and load my stated above settings from a profile and my performance was changed in a way I only recognize now that I think I learned the hard way never trust auto-OCing and what's too much on the memory controller.
Main reason I want to post this because the only sign I had that anything was wrong was my aida64 bandwidth dropped from 62,000 MBs to 50,000ish MBs and 36ns turned into on average 42.0ns at the same settings.
Clueless as to why I'm throttling without overheating and thinking my CPU is dead I plop in my 9700k and it only boot 5 times but running the same ram timings showed the same exact lower bandwidth and latency as my 9900k like a physical bottleneck. On the last boot I brought it to 1.3V 5ghz and BAM CPU red light. Just like what happened with my first gigabyte MoBo I remember the latency issues with that board too before I swapped the CPU and it shortly after died...
I'm not asking for a plzbro or something like that. It's obvious I have another dead motherboard that I pushed too far. If my CPUs are truly OK it'll have to wait till I get payed in about a week so I can buy a good board but has anyone had similar experience or simply know what exactly happened because I now see a pattern but doesnt quite add up what happened.
I thought that if my memory controller was degraded it would be my CPU that took the damage not the board and now it acts like there's no CPU.
Could this be a dying PSU, I've debated if it's possible my shunt modded Titan can kill it from the pci slot but I didn't mod that shunt I only put a .5 mohm on the top 2 rail shunts effectively halfing the power limit of those pins not the pci slots power and Ive been putting off undoing the mod because it's not the greatest for gaming...but yeah just wanted to share this experience and see what anyone thinks...as I now am running off a raspberry [email protected]
GHz lol have I mentioned I enjoy overclocking