The price of SSD start to pay attention?

Recently, Xiao Bian has been paying attention to the price of SSD. It seems that there are signs of loosening, especially the cost per GB has dropped. The small partners who want to install can save a little money. But before you buy it, you still need to know about these situations...

SSD hard disk interface options?

Currently, the SSD hard disk interface can be a little more than the traditional mechanical hard disk - in addition to the traditional SATA3, SSD also has the M.2 interface form, even more frustrating is that M.2 is also divided into B key and M key, the main reason It is different to use the channel, divide into two kinds of SATA3/NVME, the former uses the traditional SATA channel, the latter uses the PCIE-E channel, the specific Xiao Bian once was described in detail in "The several hard disk interface do not play wrong", Not much to say here.

There is no essential difference in performance between the SATA3 channel M.2 SSD and the regular 2.5-inch SATA3 SSD. The maximum transfer rate is 550MB/s, although it looks different. NVME's M.2 SSD is different, easily breaking 1400MB/s. Of course, the price is higher than that of ordinary SSDs.

From the interface style, the scope of application of these two types of SSD is not the same, the old computer or laptop upgrade, SATA interface, 2.5-inch hard drive can be, even if the computer is eliminated, it is also appropriate to buy a mobile hard disk box After all, there is no M.2 interface on old computers. For new partners or new friends who are upgrading their new notebooks (after 2016), they may consider selecting M.2 SSDs, but pay attention to the type of channel (SATA3/NVME) used by their own machine. If you do not understand this, you can give The store reported on the notebook model/board model, allowing the boss to help you judge.

TLC, QLC life problems or forget it

SSD life has always been something that many people remember, but Xiao Bian wants to emphasize it again, or forget about it. "Worried about SSD life? Don't kidding! “ Xiao Bian has calculated the SSD lifespan in detail. Whether it is TLC or QLC, Xiao Bian thinks there is absolutely no need to worry. In fact, the choice of solid-state hard disk, should pay more attention to the quality of the particles themselves and the overall quality of the SSD, rather than the theory of life.

To be honest, some of the SSDs used by cheaper SSDs are even unqualified scraps. However, the purchase price is cheap. The irresponsible small factories like to “buy it.” This group of SSDs has a low repair rate. Money. Moreover, some of the SSD's "death" does not mean that the life expectancy of the writer is approaching, but that electrical faults cause damage. This depends on the vendor's ability to control quality. So Xiao Bian here, it is recommended to buy some reliable Dachang products, the gap of more than 100 yuan, why should you use it?

Why is 120GB/128GB this?

Do not know if you haven’t noticed it, the SSD’s capacity does not seem to be the same, such as 100GB or so, and some 120GB is 128GB. In fact, this will mention a problem of reserved space. The reserved space generally refers to the inoperable capacity of the user, which is the actual physical flash capacity minus the available capacity of the user. This area is generally used for optimization, including wear leveling, GC and bad block mapping, and so on. However, this does not mean that 120GB of reserved space will be more than certain, it will certainly be more than 128GB security, which depends on the design of the manufacturer, so there is no need for this difference of several GB as a good or bad judgment criteria.

What is the most cost-effective way to buy more capacity now?

After this price reduction, the price/capacity ratio of the 240/256GB and 480/512GB products is better. To give a simple example, the Kingston A400 120GB, 240GB, and 480GB are priced at 269 yuan, 429 yuan, and 899 yuan in the Jingdong official flagship store. Each GB about 2.24 yuan, 1.53 yuan and 1.87 yuan, 240GB is certainly the most suitable for the current stage.

In general, the recent installment of Xiao Bian thinks it is a good time. The rising price of video cards has receded and the price has started to loosen. The CPU of the motherboard has been selected for centralized listing because of its new products. The selection is wide and the price is relatively reasonable; the SSD part is also stable and the whole is down. The cost of installation is more cost-effective than the end of 2017 to the beginning of 2018. Of course, the price of memory is currently still high, and it is still far-fetched to lower prices.