You need a testing lab with easily 500k worth of gear and construction cost if not way more than that to probe the data buses and obtain the parameters, we're talking about 1.6 GHz (RAM) or, and here it gets dark, up to 16 GHz (PCIe) frequency here. A scope alone that's capable of digesting such signals runs north of 250k from what I hear, you need calibrations, test probes, the room needs to be extensively shielded in order to not get disrupted by RF emissions of, say, the microwave two floors away.

And the people needed to do that are short in supply. As said, RF is dark arts, and I'm a mere radio amateur - I know people who do own such class of hardware though. They make bank. And I stay away as far as possible from anything higher frequency than LoRa. Don't got the brains for that.