

Ethernet was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3.
But, the history is a little murky, because older Ethernet was VERY different than it is today and that variety, much like the older USB 1.0, is not at all common in modern machines.
The really really old piece of hardware in every modern powerful gaming PC is the power supply. Surely the form factor and demands made on power supplies have changed incrementally over the years. But the technology that goes into power supplies wasn’t exactly new even before Ethernet or USB.
But it was O’Neal and Teal’c that were caught in the time loop.