به نقل از : FSB QPI - CPUs - CPU-Components
کد:
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.
QPi offers:
1. Lower Latencies
2. More Bandwidth
3. More Scalability
4. Lower Footprint
5. Cheaper Implementation
به نقل از : http://www.tomshardware.com/forum/275089-28-difference
کد:
I'm not sure in what context your refering to DMI, but if you mean Desktop Management Interface then it is completely unrelated to FSB or QPI.
FSB and QPI are channels which a CPU uses to talk to other components in your system (RAM, GPU, IOs).
FSB is found on old intel chips (core2 and older) and is a shared bus that connects the CPU to the northbridge and through which all data must pass.
QPI is found on the new core i* CPUs and offers a direct connection between the CPU and other components. Specifically it provides a separate channel from communication between the CPU and RAM.
The problem with FSB was that it created a bottleneck for all the data going to/from the CPU. With QPI offering a dedicated path to memory it significantly increases memory bandwidth.
اینم یه لینک دیگه :
http://forum.lowyat.net/topic/1352391/all#
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