Some people install the machine, will mainly invest the money to buy the best CPU and graphics card, coupled with large-capacity memory, in an oversized HDD, such as a Core i7-6700K, with a high-end Z170 motherboard, two DDR4 8GB Memory, come to the GTX 980Ti, and then a 6TB hard drive, think that the computer that can be equipped with this will be very fast, really good CPU and graphics card will let you have a fairly smooth gaming experience, but you will occasionally click on it in the system. The speed of opening software and games is also very slow. Is such a powerful computer a card?
HDD: Blame me (â•®)â•
That's right, the problem is on the hard disk. Although the HDD now says that the continuous read/write speed can reach 200MB/s or more, its random read/write capability is very weak. When it is used, it will encounter a lot of small files. It will cause Kardon, the reason for this is because of the mechanical structure of the HDD hard disk.
The root of HDD Caton is its mechanical structure.
The main factors affecting the performance of HDD are motor speed, disk density, number of heads, buffer capacity, etc. The performance of HDD hard disk is mainly improved by the speed. The current mainstream is 7200RPM, and the civilian level is 10000-15000RPM, but high speed means The increase in noise and power consumption is very demanding on the design of the motor, and it is not something that can be mentioned.
Disc density is also a way to improve performance. From the ancestor-class IBM Winchester hard drive, the magnetoresistance effect has been used, and the latest is the PMR change from GMR to perpendicular recording.
The main reason why HDD is slow is because his seek process must swing the head to find data on the disc. However, how does this mechanical seek process take a few milliseconds? Don’t look at a few milliseconds, the number of files is one. Once in a few milliseconds, the seek process will be infinitely magnified, which is why the HDD's casual performance is so bad.
To change this situation, you have to play SSD. The solid-state hard disk is basically composed of flash memory + main control + cache + PCB + interface. There are no mechanical parts. Data reading and writing are electronic signals. There is no bottleneck factor such as motor speed. Performance Nature will come up.
Huge performance difference between SSD and HDD
The random read latency of SSD is only a few milliseconds, while the random read latency of 7200RPM is about 7 milliseconds, and the 5400RPM hard disk is as much as 9 milliseconds. The delay response is random read capability in performance, and the random capability of SSD is far. Far away from the HDD, this is the most reflected in the speed of the switch, game loading time.
This is the Photoshop PSD file storage test when we did SSD Hengping in 2012. You can feel the gap between SSD and HDD. The performance of SSD is to completely kill HDD hard disk. At that time, the slowest SSD loading time is only HDD. Half of them are not. Now the gap is even bigger. After the SSD, you can say goodbye to Caton. This effect is much more obvious than upgrading the CPU and adding memory.
HDD development has now encountered bottlenecks, and SSD is constantly evolving.
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Our installation recommendations
Well, SSD has such a big advantage, then we do not need to have an SSD installed in the end? Our answer is yes. After installing SSD, you can greatly improve the response speed of your computer. Even for the 2000 yuan host, we recommend SSD. Now you can buy a 128GB SSD for 300 yuan. The price is no longer available. Is the problem, the cheapest HDD is also about this price, 128GB is enough to do the system disk, you can also store a lot of things, if it is not enough, then add a HDD in the future. Of course, it is best to have a 256GB or larger SSD directly on a budget.
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