Processor The microprocessor, or just the mic, is the computer's brain. Is a chip, a type of electronic component inside which there are thousands (or millions) of elements called transistors, whose combination allows work that is entrusted with the chip.
mics, such as call forward, often have a square or rectangle black, van or on an element called socket (socket in English) or soldiers on the board or, in the case of Pentium II, tucked into a kind of cartridge that plugs into the motherboard (although the chip itself is soldered inside the cartridge). Sometimes the micro
is called "the CPU (Central Process Unit, Central Processing Unit), although this term has some ambiguity, it can also refer to the entire box containing the motherboard, micro, cards and the rest of the main circuitry computer.
The speed of a microprocessor is measured in megahertz (MHz) or gigahertz (1 GHz = 1,000 MHz), although this is only a measure of the brute force of micro, a simple micro and dated to 500 MHz may be much slower than a more complex and modern (with more transistors, more organized ...) to be "only" 400 MHz is the same thing happens with car engines: an engine of the 60 American can have 5,000 cm3 but not has nothing to do against a current multivalve "only" 2,000 cm3.
Because of the extreme difficulty of manufacturing electronic components operating at MHz speeds the immense common today, all modern buses have 2 speeds:
* internal speed: the speed at which the internal microphone works (200, 333, 450 ... MHz).
* external or bus speed, or the "FSB speed", the speed with which they communicate the micro and the motherboard in order to lower the price of it. Typically, 33, 60, 66, 100 or 133 MHz
figure is multiplied by the external speed or plate to give the internal or micro is the multiplier, for example, a Pentium III 450 MHz used a bus speed of 100 MHz and a multiplier of 4.5 x. Parts of a
In a micro chip can differentiate different parts:
* encapsulation: it is what surrounds the silicon wafer itself to consistency, to prevent deterioration (eg by oxidation with air) and allow the connection to the external connectors that flattened its socket or the motherboard.
* the cache, an ultra-fast memory that uses the mic to have on hand some data that is expected to be used in subsequent operations without having to go to the RAM, reducing waiting time.
All micros "PC compatible" from the 486 call have at least the first level internal cache or L1, that is, which is closer to the microphone, so that is encapsulated by his side. The most modern buses (Pentium III Coppermine, Athlon Thunderbird, etc.). Inside also includes another level of cache, larger but somewhat less rapidly, the second level cache or L2.
* the math coprocessor, or, more correctly, the FPU (Floating Point Unit, FPU). Part of the micro specializes in that kind of mathematical calculations once stood outside the bus, on another chip.
* the rest of the micro, which has several parts (whole unit, registers, etc.) Not worth detailing here. The
MHz iCOMP
index should be noted that a micro computer with a 600 MHz will never be twice as fast as one with a micro to 300 MHz, it should be into account other factors like the speed of the plate or the influence of other components.
This is not just on account iCOMP index, a table or graph of values \u200b\u200bof the course performance of Intel-branded buses. It is widely used by Intel in their brochures, but not at all representative of the final performance of a computer running one of these buses.
In fact, the differences are greatly exaggerated, based on tests that almost solely dependent on the micro (and not the motherboard, video card, hard disk ...), so it always seems that the performance the computer will grow linearly with the number of MHz, which does not happen hardly ever. A computer with Pentium MMX 233 MHz is only 3 or 4% better than one at 200 MHz, not 16.5% of the difference in MHz or 11.5% of its indexes iCOMP. Sound unbelievable, but true.
Come on, that if you want to sell a computer with the argument that has x MHz more, or an immense iCOMP index, show very skeptical. Better a computer with all regular components (large memory, good video card ...) a lot of junk to
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