WD Black SN850 vs SN770 SSD - Which PCIe4 SSD is Best for You?

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Should you buy the WD Black SN850 from 2020 or the WD Black SN770 from 2022? Two drives from the same brand, in the same product series and build on the same interface and protocol - yet remarkably different in price, performance and abilities. Remember when choosing a hard drive or SSD was so fantastically simple? Back when practically all drive media was SATA, the differences between one drive or another were thin and it was more about durability and responsiveness than it was about speed and IOPS. However, ever since m.2 NVMe SSDs arrived on the scene (with a protocol that is built on PCIe architecture), the differences between two near-identical SSDs can be somewhat vast. Currently, the highest-performing commercially available tier of NVMe SSD storage arrives in PCIe Gen 4 x4 architecture and that has allowed SSDs to make jumps from a little over 3,000MB/s performance up to an insane 7,000MB/s+. WD was one of the first brands out there to release a commercially available SSD to provide users access to these performance thresholds back in late 2020 with the release of their WD Black SN850 SSD. When it launched, it did so with little or no competition (the Samsung 980 Pro SSD would not arrive for a month or so) and in 18+ months since its original release, despite many, MANY other 7K throughput ready SSDs arriving on the market from their rivals, this early market release has allowed them to spread hugely across the market, as well as allow more flexible pricing at most retailers and be a regular appearance at seasonal sales (Black Friday, Cyber Monday, Prime Day, etc). Fast forward to 2022 and Western Digital has released another entry into this popular series of SSDs, the WD Black SN770, that although is not being presented as a replacement for the SN850, it IS being presented as a more power-efficient and affordable alternative to the 2020 released SSD. So, which one should you buy, which one is better at different tasks and is it better to save/spend your money on either of these WD Black SSDs? Let's begin the comparison.

Video Chapters
00:00 - Intro
01:11 - Hardware Specs and Price of the WD Black SN770 SSD
01:21 - Hardware Specs and Price of the WD Black SN850 SSD
03:49 - WD Black SN850 vs SN770 SSD - Read and Write Performance
04:38 - WD Black SN850 vs SN770 SSD - NAND Density
06:33 - WD Black SN850 vs SN770 SSD - DRAM vs HMB Use
09:55 - WD Black SN850 vs SN770 SSD - IOPS Performance
10:39 - WD Black SN850 vs SN770 SSD - Durability in TBW & DWPD
11:33 - WD Black SN850 vs SN770 SSD - Verdict and Conclusion

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