Technical challenges designing a prototype common readout board for LHCb future upgrades

The LHCb Upgrade I introduced a triggerless data acquisition system, crucial for readout across sub-detectors. Upgrade II aims for fivefold throughput enhancement and requires precise clock distribution. The PCIe400 development significantly boosts performance with 400Gbps bandwidth and advanced FPGA capabilities. Key design considerations included thermal dissipation, power distribution, and signal integrity, addressing power consumption exceeding 220 watts. Additionally, advancements in striplines were achieved through improved simulation methods, reducing processing times while optimizing geometry for performance.