Man, forty minutes of cable swapping is nothing though. I get why it stings on a 6 month old build, you expect new stuff to just work, but a bad SATA cable is like the cheapest part in the whole case and they die all the time. I keep a couple spares in my drawer now (learned that one the hard way too) so when a drive drops out I can swap it in two seconds and know right away if that's the problem. Honestly the humbling part for me was never the cable, it was how long I sat there blaming the drive or the port before I even thought to try a different cable. Glad you got it sorted either way, that kind of stuff makes you way faster at fixing it the next time.