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QPI...Whats it for.

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Last response: in CPUs
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February 17, 2011 6:29:51 PM

In simple words what does it do. Is it better for all or just certain applications.

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a c 199 à CPUs
February 17, 2011 6:44:00 PM

Its just another high speed data transfer bus that intel has on their newer CPUs, it replaced the Front Side Bus that was found on Core 2 CPUs and below, and assumes a similar role to the hyper transport bus on AMD CPUs, they all do similar things, just slightly different under different names.
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February 17, 2011 6:55:11 PM

Thanks for the help. I ask this because I seen a couple of perfomance charts that showed the i7950 better than the i7975. From what I can tell the only diffrence is the QPI.The i7975 is higher and the diffrent clock speeds.
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February 17, 2011 7:01:24 PM

basically for the cpu to communicate with everything else other than the ram (because the controller is on the cpu itself), example harddrives, graphicscards , audio cards, usb, sata etc...
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February 18, 2011 6:23:47 AM

Also you will find a dual QPI link on intel Xeon processors.

This is what allows them to talk to the mobo, and another processor, hence why workstations and servers have more than one CPU for extra heavy encoding tasks etc..
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