Controller
The controller is the core component of SSD, which is to SSD what CPU is to computer. The controller controls the reading and writing of the data, as well as the algorithms of the FTL layer (such as wear balance WL, garbage collection GC, etc.) It is no exaggeration to say that the controller of Shttp://www.droneaccessoriesdiy.com/admin/dashboardSD directly affects the performance of reading and writing and then determines the overall quality of SSD. At present, the mainstream controller suppliers in the market mainly include Samsung, Intel, Marvell, SiliconMotion, Phison and JMicron. When buying a solid-state drive for laptop, don't go for the fake controller.

Samsung controller match Samsung’s own products, which have quite brilliant performance in cache technology, signal processing and other aspects, and have strong technical strength. The controller of SiliconMotion and Phison are known as high cost performance. Especially in the early days of SSD development, Phison occupied most the market share with its superior cost performance. As a semiconductor research and development company centering on technology, Marvell controller have a great achievement in aspect of chip design, mass storage solutions, mobile and wireless technologies, networks, consumer products. Marvell, which is part of the high-end category, was originally intended for enterprise use and is now available on the Plextone,
Sandisk, Crucial SSD. It has strong technical strength and the controller quality is stable, but the solid-state disk price is relatively high.

Read-write speed
Continuous read and write speed is the speed at which a file is read and written continuously. When copying large files, SSDs have an obvious advantage than HDD. What most affects users is the random read-write speed or 4K read-write speed. 4K read-write speed highlight the real perform of hard disk because files are read randomly in disk. Therefore, when choosing SSDs for laptop, we should pay more attention to the 4K random read-write speed of the hard disk.

SSD capacity determined by demand
The typical SSDs have capacity of 120G, 256G and 500G with the price from $30 to $200, which is affordable for most buyers. Of course, if you are not short of money, you can choose a higher capacity SSD. Although we all know that high capacity is good, it is important that figure out your laptop demand. If you want to install the computer system, so 120G SSD is enough. While if you want use SSD as a memory disc, the capacity is at least 250G and do not exceed 500G unless storing many movie or games. Consequently, it is recommended to buy 240G-500G SSD. Of course, the larger the capacity is, the longer the lifetime of SSD.

SSD lifetime
Suppose there are a 240G SSD with TLC NAND, which can write 1000 times, write 30G per day (generally no 30g) and its life is 21.9years (240*1000/30/365≈21.9) This is just the theoretical life span while there are other factors such as write amplification affect the life span. But now many SSD can eliminate this problem. In fact, you don't have to worry about lifetime at all because most SSDs last longer than your computer and even the solid state may not fail until your CPU, power supply and motherboard fail. Of course, the precondition is that buy branded SSDs.

Solid state drive brand
Well-known SSD brands include Samsung, Kingston, Galaxy, Intel, Western Digital and TECLAST etc. Among them, Samsung is the most recognized brand with the best performance. Generally large mainstream brands can produce their own flash memory particles, such as Samsung, INTEL, Western Digital. The solid state of Samsung has very good performance and long life. Hence the price of Samsung is a little higher than other brands of the same specification of the product. Brands such as Galaxy and TECLAST pay more attention to cost performance that sell solid-state drives with larger capacity at the same price.

Size
Make sure the appearance of your notebook, in case SSD can't fit it. Let's see what size you can fit it in before we buy it. For example, most laptop don not support 22110 M2. There are also large-capacity enterprises SSDs with thickness of 9mm instead of 7mm, which some laptops that are 2.5in thick don’t fit.  

How to buy SSDs for laptop?
It is sensible take the above factors into comprehensive consideration. The most important factory is NAND flash and controller, which largely determine the performance of SSD.

NAND flash. SSD with TCl NAND flash is the most common type. Therefore, there will be a lot of improvement in controller optimization. If you just use SSD to install system, choose the entry-level TCL SSD with 120G capacity. TCL NAND flash is one of the recommended NAND flash with price advantage among others, which is also good enough for some games and software.
MLC SSD is a good choice. If it's just one or two mainstream games in your laptop, 120GB SSD is a great option. If you have a lot of big games in your computer, 256GB SSD is recommended.
Although having fast speed, SSDs with SLC NAND flash tend to put us off because they're expensive.

Interface. It is required to determine whether your laptop can support the interface.

1. If your laptop supports an M.2 interface, a solid state drive with an M.2 interface is a priority
2. If your laptop also supports mSATA, choosing a solid state drive with mSATA interface if you can afford it.
3. If your laptop only supports SATA, you'll have to remove your mechanical hard drive and replace it with a solid state drive.

Capacity. Although we all know that high capacity is good, it is important that figure out your laptop demand. If you want to install the computer system, so 120G SSD is enough. While if you want use SSD as a memory disc, the capacity is at least 250G and do not exceed 500G unless storing many movie or games. Consequently, it is recommended to buy 240G-500G SSD.

Lifespan. You don't have to worry about lifetime at all because most SSDs last longer than your computer.

Brand. If you have enough budgets, Samsung is the first choose. While if not ,you could consider brands such as Galaxy and TECLAST, which pay more attention to cost performance that sell solid-state drives with larger capacity at the same price.

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