Summary
Information about FSB, Intel® QPI and Intel® UPI
Description
What are FSB, QPI, and UPI?
Resolution
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).