Guide to buy cpu processor: How do you choose a CPU? What
technical characteristics must be taken into consideration for judging the
performance
there
are something to consider if you want to
buy a cpu processor
Number of Core
The number of Core is the very first
thing to look at, when people read the technical characteristics of a
processor.
It 'a great indicator of what will
be the performance of your computer.
In theory, most of which are the
core in the processor is in possession, the performance will be more
interesting and multi-threading will not be a problem.
Note: Multithreading improves
performance only when these programs were developed by dividing the workload on
multiple threads that can run in parallel. Multiprocessor
systems are equipped with multiple independent computing units, a
multi-threaded but has a single unit of computing that seeks to best use
multiple threads running in the same unit of calculation. The
techniques are complementary, sometimes multiprocessor systems also implement
multithreading to improve overall system performance.
Currently (at which time writing)
you can find on the market for processors that implement two or three (only
AMD), four and six Core.
We feel strongly advise processors
that implement 3 or 4 cores.
They represent, in fact, very
balanced solutions that offer excellent support multithreading + frequency of
work (often) higher than the 6-core processors.
Core 2 processors are good only as a
fallback in case of hardship or compatibility of hardware to comply.
We recommend that you opt for a 6
Core processor if and only if you use programs that can benefit from this type
of architecture.
buy cpu processor Cache Memory
The term cache refers to that
portion of the temporary memory used because they guard that information that
need to be retrieved quickly on the request of the processor.
One thing common to all processors
(currently) is the simultaneous presence of two caches.
A first level (known as L1) and a
second level (L2).
Most often the producer decides to
implement the same cache, the first and second level, on all processors that
belong to the same generation architecture.
Processors, capable of the most
important performance than the average, also have a third level of memory that
is shared between the cores: L3.
buy cpu processor Frequency
Once it was the information that the
seller is required to understand the performance he was capable of a processor.
Today, this factor has lost some 'of
its importance to preserve the number of cores.
However, it remains a parameter to
be evaluated carefully because it indicates the processor speed, but can be a
basis of comparison only if all other characteristics (considered one of the
CPU) are comparable.
If, for example, we want to compare
two quad core processors from the same manufacturer, which belong to the same
family and have the same cache, then the one with the largest number in
attendance, will also be equipped with the greater speed of execution and
therefore , will be the most powerful.
But this argument collapses when we
wanted to compare a dual core CPU with one that has fewer than 6 cores.
In this case it is not at all sure
that the CPU with 4 cores is more of a performance with 6 core that operates at
a lower frequency.
A straight that we feel to be able
to give (generalizing) is that a processor that takes 3 or 4 cores and
exercising at a frequency of 2.5 GHz (or more) is powerful enough to handle
games and applications of a certain level. That is to
say, they can easily keep up with the needs of average Italian family.
buy cpu processor Core Turbo and Turbo Boost
As we noted in the section on
"Frequency", the processors have reached a degree of evolution that
it forces us to consider many things before you can buy one.
Among those also listed two
technologies that we have mentioned several times in the course of our reviews.
We refer to the Turbo Core AMD and
Intel Turbo Boost.
Both operations are going to change
the operating frequency.
The concept on which they are based
is very simple.
Because a computer maximizes its
processor only in specific activities (image editing, video editing, games,
etc.), all the time remaining the processor is operating under what are its
real possibilities.
What was found of the engineers?
They made sure that the number of
active cores were mild and decreased during the operation frequency is
increased because the action can use the right power.
This is a momentary overclocking
tends to enhance performance of single core in spite of their massive use.
This translates into significant
benefits for the PC. First of all electrical and decrease
fuel consumption and, in the case of portable, battery life increases.
We want to bring an example car. Imagine you bought a car from the high displacement. Let's pretend it's a 2000.
We all know that a machine of such
features will have significant consumption.
Now imagine you can push a button
(in the PC is automatic), which reduces the capacity of the machine at certain
times, such as stopping at traffic lights, a traffic jam on the freeway, etc
...
buy a cpu processor Hyper-Threading
Every time we reviewed a notebook
with Core i7 i5 or, we always brought up (in addition to the Turbo Boost
technology) also Hyper-Threading.
We're talking about, then, only
Intel processors.
This technical adjustment to allow
processors to take advantage of the double of their physical cores.
Consequently, the executable threads
are also doubled.
The performance benefit of
approximately 20% (again with the same characteristics! Never compare two
different processors in the architecture and functions).
Black Edition & Extreme Edition
The first term is typical of AMD,
the second of Intel.
This term tends to diversify a
certain class of processors that allow the user to change the multiplier of the
internal operating frequency (in other models of the CPU multiplier is fixed
irreversibly).
Translated into more direct terms,
gamers can enjoy high performance and overclocking the processor-are purchased.
buy cpu processor Storage Controller
The memory controller is a direct
support to the RAM, in particular to DDR3.
Usually this channel is double. Only the line Core i7 Extreme processors incorporate a three-channel
controller.
It goes without saying that this
parameter is important when you need to buy RAM banks.
buy cpu processor Production Technology
Nearly every year the production
technology varies and is an indicator of the generation of the processor
belongs.
We are referring to the architecture
with which a CPU is produced.
At the time of writing, the
processors are manufactured with technology from 45 nanometers or 32
nanometers.
The latter is preferred because it
allows a lower power consumption and, in any case, the same consumer, the
models possess higher operating frequencies.
buy cpu processor Parameter TDP
This parameter indicates the maximum power provided by the
manufacturer.
This number is reached only when the
CPU run at full speed.
It 'important to consider this value
when you need to choose an adequate heat sink.
But in this regard is very useful to
buy processors in their retail package that contains both the CPU heat sink is
adequate for standard use of the product.
Socket
If you have already have a motherboard that would become essential to check
that the socket will then be coupled with the motherboard.
If you buy a computer in full, it is
important to check the socket.
It becomes, when you buy the
components one at a time and then assemble them.
Multimedia Instructions
What is AMD or Intel processor
integrates a set of instructions that accelerate multimedia functions (think of
the compressed video content).
The term used to identify these
statements is SSE (Streaming SIMD Extensions). The
version is indicated by a progressive number: eg, 4.1 - 4.2 etc. ..
buy cpu processor Consumption
When you buy a desktop computer,
probably the first thought goes to consumption.
The story is different when you
shoot at stake notebook computers.
The consumer is in fact an important
discriminating on battery life.
Consumption also depends on the
technical characteristics of the CPU.
The higher the frequency, the more
cores, more coarse the production process and the higher the consumption.
Labels: cpu
Processors
for laptops are very different compared to their counterparts in traditional
systems. 
Low-cost systems 
