If you really need the latest driver for everything, go through System Devices one-by-one and you can watch your memory controller go from (for example) Intel Skylake U-series Memory Controller to Intel Xeon v5/E3-1200 DRAM Memory Management Controller.
This is probably the best way to keep Management Engine and SGX up to date, in all seriousness, though. And why doesn't 1903 install the latest available? Only Microsoft knows....if even they know. I suppose it's possible telemetry and algorithms dictate the most likely driver version to succeed for the hardware combination detected.
Be careful on inserting this (or any G34 chip) into the socket. Once you pull that restraining lever, it is either a good install or a piece of silicon jewelry.