what is qpi link
QPI is used to link processors to the motherboard chipset. QPI can also be used to connect to other processors. A QPI link is one to one, so a processor needs one link for a single processor system, 2 links for a dual processor system and 4 links for a quad processor system.VincentP said: Related resources. 1  QPI speed on different Core i7 models. QPI link is one to one, so a processor needs one link for a single processor system, 2 links for a dual processor system and 4 links for a quad processor system.