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Differences between Core i5 and Core i7

Core i5 was released in September 2009, and is considered as a mainstream version of Intel's previous release, Core i7. These new processors are somewhat same as that Core i7, having only some specific differences. Or you can say, some improvements have been made along with some differences. One of these is the increased acceleration of the turbo mode. Turbo Mode is a feature in Intel's i7 processors by which the pulse rate of the clock is automatically increased if load allows it to do so. Or in others words if load is less, then some cores will go idle, and at that time the pulse rate of the clock will increase, resulting in enhanced processing speed. The core i7 965, for example was previously, able to shift its speed from 3.2 GHz to 3.46 GHz. As said by Intel, this feature has been enhanced in Core i5 processors.
Lately, Released Core i5 processors use two channels for RAM sticks. In Core i7 there were three channels for RAM sticks, or in other words you were supposed to insert three RAM sticks for better performance. But now in Core i5 processors, A Dual channel port is available for RAM. So the change has been reverted back. This will of course lower the cost, for most of the users; this change will not matter a lot, except some people like gamers etc. However, some new Core i7 processors will also support the Dual channel ports.
The inclusion of a new socket along with a chip is another difference. In Core i7 processors, a new socket LGA1156 has been included, along with a chip P55, which is considered as a mainstream chip. Although it is supposed that many new Core i7 processors will use the same socket, but at this time Core i7 uses LGA 1366. The inclusion of both in a same package will help decrease the price, although having fewer features.
Hyper-Threading is a phenomenon, in which more cores are simulated, with the help of efficient multi-threading programs, than actually are present physically on the processor. The numbers of physical cores remain same but more cores are simulated. For example in Core i7 technology processors, four physical cores are actually present which bear the load, but four more are created, you can say, virtually, and appear as eight cores as a total in Windows. In Core i5 processors unlike Core i7, there will be no Stimulatory cores, as a result Core i5 products will not be as effective as of Core i7 products, in the long run, during heavy multi-threading, requiring applications.