What Are FSB, Intel® QPI, and Intel® UPI?
Content Type: Product Information & Documentation | Article ID: 000026957 | Last Reviewed: 08/31/2021
What are FSB, QPI, and UPI?
FSB stands for Front Side Bus. It is an old subsystem transfer.
Intel® QPI stands for Quick Path Interconnect. It is the system we use now, when it is reporting a value of "0". This means that the processor has another bus subsystem transfer technology, such as Intel® Ultra Path Interconnect (Intel® UPI).