I was wondering when people consider themselves to have a new PC. Technically I’ve had the same PC for close to 20 years now, but every part’s been upgraded several times over.
I figure everyone’s got a different mind about it. For me, I’d have to say when all of the big three—CPU, GPU, mobo—have completed a phase, my brain thinks of the previous setup as “the old PC”.


When the motherboard gets updated. Because you can only upgrade the CPU so much before you have to get a new motherboard to get something better. And if you upgrade the motherboard you have to get a new CPU.
In this context, an upgraded motherboard has a newer socket type on it. Not just going from a budget motherboard to a top tier.