https://people.freebsd.org/~lstewart/articles/cpumemory.pdf
SMP stands for Symmetric Multiprocessing. It is a computer system design where two or more identical processing cores connect to a single main memory and share input/output resources…

FSB: front side bus: the bus connects CPUs and the rest of the motherboard
Northbridge contains memory controller, today is deprecated, merged to on CPU (on die???)
DDR SDRAM = double data rate “It improves on earlier SDRAM technology by transferring data on both the rising and falling edges of the clock signal, effectively doubling the data rate without increasing the clock frequency. This technique, known as double data rate (DDR), allows for higher memory bandwidth while maintaining lower power consumption and reduced signal interference.”