Unfortunately, this deal has expired 4 days ago.
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Posted 25 May 2023
500GB - WD_BLUE SN570 M.2 2280 PCIe Gen3 x4 NVMe v1.4 NVMe w/SLC cache up to 3500/2300MB/s - £25.20 (UK Mainland) Sold by Ebuyer @ Amazon
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Brutes Super Poster
Joined in 2016
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About this deal
This deal is expired. Here are some options that might interest you:
Note: Dramless/TLC
About this item
About this item
- Keep your imagination flowing as you create faster while maintaining low power consumption. With read speeds up to 3500MB/s1 (500GB and 1TB models), your system can run up to 5X faster than our best SATA SSDs so you can stay in your creative moment..Voltage: 220-240 V
- Remarkable reliability features to help protect your content so you can stress less about losing your brilliant work
- Work with extra confidence and peace of mind as the downloadable Western Digital SSD Dashboard helps you monitor your drive’s health, available space, temperature and more.
- Build your ideal creation engine. Upgrade your system or optimize your next custom build with the slim M.2 2280 form factor. All you need is an NVMe slot.
- Save on space as you pack a lot of performance into your small-form factor PC with a single-sided M.2 2280 PCIe Gen3 x4 NVMe SSD.
- Acronis True Image for Western Digital software backs up everything from operating systems and applications to settings and project files with support for PCs.
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Edited by Brutes, 14 June 2023
15 Comments
sorted by"SSDs use NAND Flash memory, which is the most expensive yet indispensable component of the device, in addition to Dynamic Random Access Memory (DRAM) as a cache for writing data to the SSD and for storing and recording its data mapping tables; since it is about 100 times faster than NAND flash."
"The DRAM on an SSD is used to store data mapping tables, which keeps track of logical blocks and their physical locations in NAND. On DRAM-less SSDs this mapping table is stored in NAND. Since NAND is slower than DRAM, DRAM-less SSDs’ performance may be slower than SSDs with a DRAM cache. However, Virtium’s engineering analysis concludes that SSD performance highly depends on the specific workload."
DRAM is dedicated memory that is up to 100x faster than the storage modules that make up the main storage of the drive. This allows data to be cached on the DRAM to improve performance, so sustained write performance is kept resilient using DRAM. DRAMless drives typical use HMB (Host Memory Buffer) which means it uses the computers RAM to cache the data. Depending on the workload you may see benefit using DRAM. Typically for a general consumer it doesn't really matter and it is the tolerance of the NAND memory which is more important and also the quality of the NAND controller which is more important.
Didn't understand the above? No probs >
DRAM - Dedicated memory to improve read/write performance which is up to 100x faster than the main storage of the drive
DRAMless - Uses a tiny portion of the computer's RAM (so the 16GB, 32GB etc you usually see a computer come with) to perform a similar function as DRAM
For the general user it doesn't actually matter and it is the quality of the NAND memory and NVMe controller that is more important.
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