Tuhin CSL said:
i need to know wats the basic difference between FSB & QPI ?
pls let me know.
A Front Side Bus is a large parallel subsystem that transfers data between computer components inside a computer or between computers. Every component on a motherboard is connected to, and therefore shares, a single Front Side Bus (there are systems with parallel FSBs but that's another issue entirely).
QPi, or Quick Path Interconnect, is a Point to Point Interconnect. It connects the CPU (or several CPUs) to a I/O HUB (In and Out Hellenic United Backbone). The I/O HUB is where the devices on the motherboard connect too. A single Point connecting various devices to one or more Point to Point interconnects. QPi works in a serial-differential manner (as opposed to the parallel manner in which FSB works).
QPi therefore offers the ability to transfer larger amounts of data on a smaller electrical footprint than a Front Side Bus. The signal integrity is also less prone to degrading in a Point to Point Interconnect than it is with a Front Side Bus when scaling the operating frequency in an upwards fashion.
1. Lower Latencies
2. More Bandwidth
3. More Scalability
4. Lower Footprint
5. Cheaper Implementation