SanDisk 4TB SSD PCIe 5.0 NVMe

The WD_BLACK SN8100 is one of the fastest consumer SSDs we've ever tested, with 14,900 MB/s reads and top-tier random performance. It's expensive and runs hot, but the 4TB capacity and endurance make it a serious workstation drive. Worth it only if you actually need Gen5 speed.

This drive is best-in-class across the board. Sequential reads at 14,900 MB/s and writes at 14,000 MB/s put it in the 100th percentile for speed, and random performance is just as strong at 2,300K read IOPS and 2,400K write IOPS. The 4TB capacity is also a standout, and endurance is solid at 2,400 TBW. The catch is heat. Customer reviews consistently mention that you need a motherboard heatsink or a separate cooler, especially if you grab a version without one included. Power efficiency is good for Gen5, but sustained writes can still push thermals hard.

Against the Samsung 9100 PRO, the SN8100 trades blows on raw speed but often comes in a bit cheaper depending on the day. The Kingston FURY Renegade and Crucial T500 are excellent Gen4 drives that cost significantly less and still feel fast in everyday use. The Micron T710 is another Gen5 option worth a look if you want similar performance with different firmware behavior. And if you already own a WD_BLACK SN850X, the jump to this drive only makes sense if you regularly move enormous files. For gaming, the difference is barely noticeable.

Pricing is all over the place. In the US, we see listings from USD 790 to USD 1,006, so shop around before you buy. Canadian buyers face an even wider spread, from CAD 1,080 to CAD 1,800. The best US deal we found is around USD 790, which is still a lot of money for 4TB. You're paying a serious premium for Gen5 speed, and for most people that premium is hard to justify. If you need this level of throughput for video editing or AI datasets, fine. Otherwise, a fast Gen4 drive gets you 80 percent of the real-world experience for way less cash.

The WD_BLACK SN8100 is a 4TB PCIe 5.0 drive that sits at the absolute top of our speed charts. Sequential reads hit 14,900 MB/s and writes land at 14,000 MB/s, which is about as fast as consumer storage gets right now. It also packs TLC NAND, a DRAM cache, and a heatsink, so it's built for sustained heavy lifting.

But this thing is not cheap, and it runs hot. The affordability score is one of the worst we've seen, and several owners mention you really need proper cooling. If you're moving massive files or doing AI work, it's a monster. If you just want faster game loads, you can spend a lot less and still be happy.

Skip this if you're mainly gaming or just want faster boot times. A good Gen4 drive like the Crucial T500 or WD_BLACK SN850X will feel nearly identical in everyday use and cost hundreds less. Also skip it if your case has poor airflow or no M.2 heatsink, because this drive will throttle when it gets hot.

Buy this if you are a content creator, data scientist, or anyone who moves multi-hundred-gigabyte files on a regular basis. The speed is real and the 4TB capacity means you won't run out of room anytime soon. Everyone else should probably save the money and grab a high-end Gen4 drive. This is a specialist tool, not a casual upgrade.