DRAM SSD or SLC Cached SSD, what kind of thing these are?
SSD comes with various flavours, such as different sizes, different speeds, and with different write endurance. Based on their differences price also varies. These Hard Drive replacements can vastly improve your PC’s performance, loading times, and no chance of failing as HDDs by staying turned on all time.
But there’s a catch. They have limited write cycles, that means there’s a limit that how much data you can write onto a SSD before fails. Most of the consumer SSDs come as TLC (Triple-Layer Cell) or QLC (Quad level Cell), which are cheaper to manufacture and have lower write cycle than SLC type NAND flashes.
TLC or QLC SSDs come with mainly two types of variants, DRAM SSD & SLC cached types. DRAM SSDs are equipped with a special Dynamic RAM, and SLC cached types are just TLC or QLC SSDs but one part of them behaves like SLC (more likely Pseudo SLC, also known as DRAM-Less SSDs) to improve performance.
So, which one you should buy?
DRAM SSDs are equipped with DRAM to improve its speed and longevity, as there are limited write cycles. DRAM provides much faster read write access, and controls much more reliable wear Levelling than SLC Cached SSDs. Also, they tend to be a little pricier than cheaper SLC cached types. If you want to use SSDs for boot drive, or any work that needs random accesses of read-writes, and care about Disk longevity, then you should buy these types of SSD.
On the other hand, if you’re using SSDs just for archiving, or back-up drive, where you won’t do any random access tasks, then you should buy DRAM-less or SLC cached SSD. They tend to be cheaper, and slower than above mentioned one. These also have less time of warranty from the factory.