Choose a processor that is adequate but not too expensive
Processors are the engine of your laptop.If you get a fast one,you can run a lot of applications faster.That is why processor is such an important factor in choosing a laptop.
One of the main characteristics differentiating notebook processors from other CPUs is low-power consumption.Although some laptop makers have used desktop processors in their laptops to get a performance edge.
Desktop processors typically have massive heat-sinks and fans to cool them down,but it’s hard to fit that stuff into a tiny laptop,and fans drain laptop batteries quickly.This is important because you want your battery to last a long time and you also don’t want to burn a hole through your lap.
Performance characteristics that differentiate laptop CPUs include the amount of cores they contain,the cache memory, and bus speed–as well as the speed of the chip itself.different cores have different abilities.
Before going to choose processor you have to know some terminology Thermal Design Power/TDP: A useful term to understand thatis it represents the maximum amount of power the cooling system in a computer is required to dissipate.
For example, a laptop's CPU cooling system may be designed for a 20 W TDP, which means that it can dissipate 20 watts of heat without exceeding the maximum junction temperature for the chip.It’s not like it will always dissipate that amount of wattage, but, generally,
if you want a cooler processor, go for the lowest TDP you can get. Front Side Bus (FSB):the Front Side Bus is the data transfer bus that carries information between the CPU and the northbridge of the Motherboard.Bus speed determines how fast the processor talks to the rest of the computer.
Notice that many manufacturers today publish the speed of the FSB in megatransfers per second (MT/s),not the FSB clock frequency in megahertz (MHz).This is because the actual speed is determined by how many transfers can be performed each clock cycle as well as by the clock frequency.
For example, if a motherboard (or processor) has a FSB clocked at 200 MHz and performs 4 transfers per clock cycle, the FSB is rated at 800 MT/s.
Multi-level caches: A CPU cache is a cache used by the central processing unit of a computer to reduce the average time to access memory.The cache is a smaller, faster memory which stores copies of the data from the most frequently used main memory locations.
Multi-level caches contains with small fast caches backed up by larger slower caches.so Multi-level caches generally operate by checking the smallest Level 1 (L1) cache first; if it hits,the processor proceeds at high speed. If the smaller cache misses, the next larger cache (L2) is checked, and so on, before external memory is checked.
now a days cache available 2MB,4MB,8MB and so on.... better to go 4MB.
Finaly my conclusion
Celeron-M:This low-cost processor has speeds up to 1.5GHz.People looking to email, surf the Internet, and use word processing applications will be fine with the Celeron-M. It replaced the Pentium III-M in the low-end laptop processor arena.
Pentium-M: Buy a battery-efficient(NEXT WE WILL DISCUSS LAPTOP BATTERY) Pentium-M, available in speeds up to 2.1GHz. The processor is part of Intel's Centrino Mobile Technology with built-in Wi-Fi.
Celeron: Intel's budget-oriented chip with speeds up to 2.5GHz. They run slightly slower than Pentiums but not as slow as pentium-M!
Pentium 4: Designed for desktops, Intel's Pentium 4 will appeal to multimedia enthusiasts. With speeds up to 3.33GHz, they tend to get hot and eat up battery life. If you intend to stay plugged in, they offer great performance.
Intel Core Duo: Intel’s Core Duo line benefits from having multiple processors on one chip. These are especially useful if you have multiple heavy computing needs that need to run simultaneously.
AMD Sempron: If you don’t need much computing power, or are on a very tight budget, the Sempron is AMD’s low end chip.
AMD Athlon 64: Always a favorite of gamers, the Athlon 64 supports 64-bit computing and is usually found in desktop replacements.
AMD Athlon 64 FX: Originally designed as a high-end line, the FX now shares many of its original qualities with the Athlon 64 line. However, the unlocked clock multipliers on the FX chips keeps it very popular with the overclocking crowd.
AMD Turion 64: Capable of running both 32-and 64-bit programs, the Turion is designed for high performance, while allowing thinner and lighter notebooks.
AMD Turion 64 X2: The dual core version of the Turion 64.
LAPTOP REVEWS NEXT WE DISCUSS LAPTOP BATTERY >
