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1. Basic User Mistakes About CPU ???
CPU is probably the first criterion when the user chooses. Once upon a time, “CPU speed” was an easy and accurate way to measure the performance of two computers, but this was not true long ago.
Recently released CPU models are powerful enough to perform simple tasks, so you’ll need to consider other factors when comparing a computer’s performance. For example, does the computer you’re considering using a solid-state drive (SSD), or just a mechanical hard drive (HDD)? Even when there are other similar components, comparing CPUs based on clock speed is also inaccurate.
2. Why can’t you rate performance based solely on processor clock speeds?
Everyone knows the CPU speed is measured in hertz (GHz – 1,000,000,000,000 Hertz). The CPU clock cycle indicates the number of clock cycles the CPU can perform per second with logic per second. For example, a CPU clocked at 1.8GHz can perform 1.8 billion logical operations (switching transistors on and off) per second, or 1.8 billion CPU cycles per second.
The popular thinking today is that the CPU that does more logic per second is “faster”. This is both accurate and inaccurate.
In fact, when comparing two CPU models from the same processor family, you can completely look at their clock speeds. For example, you are comparing two Core i5 models of the same Haswell generation, with the only difference in clock speed: one clocked at 3.4GHz; one model is clocked at 2.6GHz. Thus, the 3.4GHz model will be up to 30% faster than the 2.6GHz model when operating at maximum capacity.
Conversely, you can’t compare performance based on clock speed of Core i5 Haswell and AMD CPUs, ARM CPUs on smartphones / tablets, or even lower Core i5 generations like Ivy Bridge, Sandy Bridge. …
The reason is simple: New CPU models become more efficient each day, meaning that in each logic cycle they get more work done. For example, in 2009 Intel launched Core i7-960 with a clock speed of 3.2GHz. In 2012, Intel launched the Core i7-4770 with a clock speed of 3.4GHz. So, hasn’t Intel’s processors been any more powerful over the past four years?
Our answer is “no, Intel’s CPU has a significant increase in power”. With each generation, Core i7 models can do more parts of the task per clock speed. Not only do you need to consider the number of cycles a processor sample can perform per second, but also how many tasks they perform in each computational cycle.
Even if the two models of CPU have similar performance, you should use a lower clock model and perform multiple tasks per cycle, rather than a single model with a clock speed. go higher and do fewer tasks per cycle. Reason? The lower the clock speed, the less heat the CPU produces.
3. Current CPUs are not operating at a single speed
All generations of CPU do not require the CPU to use up its 100% operating clock all the time, “when the task needs processing and the Heat dissipation” are two important issues to solve, so their CPUs will run low when idle, and high clock when demanding. The CPU will automatically increase and decrease the clock speed as needed. When running the game, opening multiple tabs in the browser, processing video … CPU will increase the clock speed. When you turn off all programs, the CPU will lower the clock speed to save power.
Therefore, when buying a laptop, you also need to consider the CPU clock speed, as this will affect the battery life. Keep in mind the heat dissipation issue: Ultra-thin laptops like the MacBook Air or Ultrabook models will only be able to run at their highest clock speeds for a certain time; Then their clock speed will be reduced because the ultra-thin design makes it difficult for Ultrabooks to dissipate heat well. On the other hand, laptops with the same processor but with better heat dissipation will have better performance, as long as the CPU is kept cool enough to continue running at maximum clock speed.
4. Know the right about CPU power (core – Core)?
Maybe people are a little bit wondering and do not understand the number of Core CPUs, so OK, I will explain clearly to you, the core cpu or called the core number in the CPU to handle the task, is an important factor. In the past, since the Pentium 4 era, people will only see 1 single core CPU, But cpu increasingly improved from dual core CPU to quad core, then to 6 core, 8core especially in Xeon cpu line has a relatively large number of cores. Of course, people can notice that the larger the number of cores, the stronger the CPU, but you may have a wrong perception of the CPU’s core number.
Most users think that Dual Core CPUs (2 cores) will be twice as fast as single core CPUs or Quad Core CPUs will be twice as fast as Dual core. This may not be accurate, when foreign experts test, the dual CPU only increases the CPU’s computing power by 40% compared to the single-core CPU.
Similar to the fact that Dual core CPU is only 40% more power than single-core CPU, maybe people are wrong about core count and Hyper-Threading technology of Intel Core i Today.
We need to know that starting from Core i CPU, Intel has integrated Hyper-Threading technology into its CPU, which means 1 CPU core will be Threading 2 to handle 2 tasks at the same time, As So CPU Quad core will be threading into 8 data processing streams, This will make users quite confused when testing on their computer ..
The integration of Hyper-Threading technology increases CPU power by approximately 40%. Many people will still wonder why I have 2 cores, independently why increase the power by 40%, OK..I will take Example:
For example:
-The 2 Core In 1 CPU work, This is similar to the fact that we have 2 people shovel 1 pile of sand – Unlike 2 People shovel 2 people to freeze sand.
– Although 2 people shovel sand together faster, but 2 people shovel 2 piles of sand, the workload is better
– 2 People Shovel the sand pile faster and less tiring, but 2 people shoveling 2 piles of sand will be more tired but more efficient. But in the computer, the more tired I do not have to worry.
– >> This is also the explanation for why the machines with a large number of cores or the machine that uses 2 CPUs are hotter than the other machines.
