SanDisk SSD

The SN8100 is an 8TB Gen5 monster with 14,900 MB/s reads and best-in-class random performance. It's built for workstation users who move huge files constantly, not gamers. Pricing is all over the place, from $1,900 to $2,600 USD, so shop carefully. If you need 8TB in one slot with Gen5 speed, this is one of the only games in town.

Let's talk numbers. 14,900 MB/s sequential read and 11,000 MB/s sequential write on this 8TB model. The 2TB and 4TB versions actually hit 14,000 MB/s writes, so the 8TB gives up a little write speed in exchange for double the capacity. Random performance is 2,300K IOPS both read and write, which puts it in the 99th percentile of every drive in our database. That's the absolute best right now, no caveats.

What does that mean in practice? Sustained workloads are where this drive separates itself. Users specifically mention that it outperforms other drives when you're hammering it with big file transfers for minutes at a time, not just seconds. The DRAM cache and TLC NAND hold up well under pressure. One thing to watch: heat. Multiple owners point out that you need a proper heatsink, either from your motherboard or a separate one. Gen5 drives run hot, and this one is no exception. If your board has a chunky M.2 heatsink, use it. If not, budget for one.

The Samsung 9100 PRO is the obvious rival here. Samsung's drive is newer, has a longer track record in the Gen5 space, and typically comes with better warranty terms. But the SN8100 matches or beats it on raw sequential reads, and the 8TB capacity is a differentiator. Samsung's 9100 PRO tops out at 4TB right now, so if you need 8TB in one slot, the SN8100 wins by default.

The WD_BLACK SN850X is the Gen4 predecessor, and it's still a great drive. You'll pay a lot less for it, but you're leaving roughly half the sequential speed on the table. The Crucial T710 is another Gen5 option worth considering, often priced more aggressively. And the Kingston Fury Renegade and Seagate FireCuda 530R are solid Gen4 alternatives if you don't actually need Gen5 speeds. For most people, the honest answer is that a good Gen4 drive is plenty. The SN8100 is for people who know they need the extra throughput.

Here's where things get messy. In the US, we're seeing this drive listed anywhere from $1,900 to $2,600. That's a $700 spread for the exact same product. In Canada it's even worse, CAD 2,500 to CAD 5,637. That's more than double depending on which store you're looking at. If you're shopping for this drive, the store you pick matters as much as the drive itself. The lower end of that US range is actually reasonable for 8TB of Gen5 speed. The high end is a hard pass.

For context, you could buy two 4TB Gen4 drives for less than the high-end price of this one. But you wouldn't get the same sustained performance, and you'd burn two M.2 slots. If you need 8TB in a single slot with Gen5 speeds, this is one of very few options. Just don't pay the premium price. Shop around, wait for stock to normalize, and grab it at the low end of that range.

The SanDisk WD_BLACK SN8100 is one of those drives that makes you stop and stare at the spec sheet for a second. 8TB of TLC NAND crammed onto an M.2 2280 stick, pushing 14,900 MB/s sequential reads over PCIe 5.0. That's not just a big number, it's roughly double what most Gen4 drives top out at. If you're coming from an older SN850X or a Samsung 980 Pro, this thing will feel like a different class of hardware.

Who's this actually for? Workstation users, mostly. Our scoring puts it at 90.8 for workstation tasks, which is about as good as it gets. Video editors moving around 8K footage, people training local AI models, anyone who regularly shuffles files that are hundreds of gigabytes. Gamers get a solid 86.7, but honestly, most games won't push this drive hard enough to justify the price. You'd be paying for headroom you'll rarely use.

There's a weird wrinkle here too. The product page says this drive has been replaced by the SanDisk Optimus GX PRO 8100. So you're looking at a drive that's technically last-gen, even though it's still one of the fastest things you can buy. That might explain the limited availability and the wild price swings we're seeing across vendors. More on that later.

Gamers should skip this. You're paying workstation prices for speed that won't change your frame rates or load times in any meaningful way. Grab a 4TB SN850X or a 2TB Gen4 drive and spend the difference on a better GPU. You'll actually notice that upgrade.

Also skip it if you're on a tight budget or don't have a motherboard with PCIe 5.0 support. Dropping this into a Gen4 slot wastes most of what you're paying for. And if you're not moving massive files regularly, the sustained performance advantage is irrelevant. A solid Gen4 drive will feel just as snappy for everyday use, web browsing, and even most creative work.

If you're building a workstation that handles massive files daily, this drive is hard to beat. 8TB of fast TLC storage in a single M.2 slot, sustained performance that doesn't crumble under load, and endurance that'll outlast most builds. Video editors, 3D artists, AI tinkerers, this is your drive. Just make sure your motherboard has a proper heatsink and you're not paying the inflated price.

For gamers, I'd steer you elsewhere. The 86.7 gaming score is fine, but you're paying a huge premium for speed that games simply don't use. A 4TB SN850X or even a 2TB Gen4 drive will load games within a second or two of this thing and cost a fraction as much. Put the savings into a better GPU. That's where you'll actually feel the difference.