This is a complete mystery to me, but yesterday i was playing MSFS , My pc crashed in the middle of the flight and wouldn't turn on again. My system is a gigabyte z790 aorus ax, rtx 4070ti, 32gb ddr5 gskill 6000 trident z ram, And  2 Lexar 1tb m.2 nvme in raid 0 with a 8tb storage drive The CPU is a 13600k, which handles anything I threw at it. After messing with the pc the rest of the day, One m.2 died in my raid 0, So I lost all my flight sims currently installed, Then my pc would only boot with one stick of ram. I tried each ram stick by themselves and the pc would not boot with one of the sticks by themselves, But the other stick booted up the pc. I was able to get windows 11 reinstalled on the single nvme drive fine, with one stick of the ddr5. I tested each slot on the motherboard, and they all work with the working one stick of ram, but not with both. So i ordered new ram yesturday, And it will be here today. As far as the m.2 it's dead and will have to wait. Has anyone had a failure like this before? It wasn't storming or anything that would have power surged. Could half of my motherboard died? I am just asking for suggestions, Because i have never seen anything like it in 20 years building computers.

1 hour ago, Patriot3810 said:

I am just asking for suggestions,

I had something similar once and I can understand the frustration. That was caused by a PSU failure. When more than one item fails suddenly, it usually suggests a power surge of some kind, and I see you have ruled out thunderstorms. That could suggest a PSU fault, although it appears to allow your system to power up. However I would try to get the PSU checked out under load. The other possibility is the motherboard power supply system. Could heatsinks have become detached?  Unfortunately, investigating these faults usually involves a lot of trial and error, which as a pc builder, you are probably aware of. I wish you luck.

Ugh...now that sucks.

Catastrophic failure of the PSU and/or the voltage regulators on the motherboard could do this.  Usually they fail passively without taking out downstream components, but...not always.

I always generously overspec and overbuild when it comes to power supply and VRM capacities for this very reason.  I had a mobo VRM cut loose on me 20+ years ago--it didn't nuke the rest of the computer, but the motherboard ended up with a gnarly black fried-out spot.

I certainly would not trust either the PSU or the mobo in a rebuild.  And I'd thoroughly test any components you keep in the new build.

Thanks for the reply's. I put the new ram in and set it to xmp to it's 6000 mhz speed and it booted right up with the 2 new sticks of ram. The second m,2 nvme when i plug it in, Shows as a 1.8tb m.2 and won't format, So it must be faulty. The power supply is an 850w sea sonic gold, And it's a year old. I can only come to a conclusion that I had a power surge of some kind. I am going to replace the PSU in the next few days just to be safe. I am also using a surge protector with 30min of battery life. Now it's back to installing everything over again. Thankfully for all of us, Ram and m.2 nvme's are fairly cheap compared to motherboards, cpu's and video cards. I bet ram and m.2's will sky rocket at some point. Thanks again for the Information.