System topology to remind the enhancement about the platform
Platform usage for x86-based system might be based on the PCI Express system topology. To understand the chipset or solution enhancement in each year, serial bus enhancement might contain some primary changes in each version.
PCI Express brings the change from a parallel bus to a serial bus about the data transition. A parallel bus with the bit transition with payload and latency would limit the data for more stable hardware and schematics. Serial bus to some retry and error correction capacity for some speed enhancement drive the serial included the simplified platform for platform design.
Protocol communication during serial bus is more flexible during the data transition in low latency. The high speed could cross different paths to transfer data through Tx/Rx and buffer usage.
These drivers have various capabilities with high-performance data transition through a serial bus. With USB, PCI Express, CXL, and UCI, the limitation with these serial buses based on the various serial bus data transitions in each serial bus would cause the bottleneck and wait for priority during protocol transition.
Various layers from system application to the physical layer with serial bus contain more consideration about the error correction and retry capabilities. Based and different serial bus protocol transition behavior understanding the limitation of heavy loading from root to endpoint help to understand some usable performance and power considerations design. With 3GPP for 5G applications devices, power efficiency with some considerations drives more service perspective usage about the device. More non-x86 devices could base on perspective usage about the platform.