SanDisk Optimus GXPro 850X 2TB PCIe 4.0 x4 NVMe M.2 2280

The GXPro 850X hits 96th percentile random performance, making it one of the fastest drives we've tested for scattered workloads. Sequential speeds of 7300 MB/s read and 6600 MB/s write are also strong at 89th percentile. But affordability sits at just 16th percentile, so you'll pay a premium for that speed.

The random performance is the star of the show. At 1200K read IOPS and 1100K write IOPS, this drive sits in the 96th percentile of our database. That's best-in-class territory, and it means the GXPro 850X handles scattered small file operations better than almost anything else we've tested. For gamers, that's faster texture streaming and level transitions. For creators, it's smoother scrubbing through timelines.

Sequential speeds are strong too. 7300 MB/s read and 6600 MB/s write put it at 89th percentile, which is one of the best on the market. The DRAM-less design doesn't seem to hurt here, thanks to nCache 4.0. But keep in mind those random IOPS numbers are for the 8TB model. The 2TB version should still be fast, just maybe not quite at that peak.

Against the Samsung 9100 PRO, the GXPro 850X holds its own on random performance but likely trails on brand recognition and social proof. The Kingston FURY Renegade SFYRDK/4000G is a strong competitor with similar PCIe 4.0 speeds and often better pricing. The Western Digital WD_BLACK SN850P is another solid alternative, especially if you want a drive with more real-world reviews behind it. The Crucial T710 and Lexar NM1090 PRO round out the field with competitive specs. The GXPro's 96th percentile random score is its main differentiator, but that advantage comes at a cost.

Value is where the GXPro 850X stumbles. With affordability at 16th percentile, this is one of the pricier drives in its class. In Canada, prices swing from CAD 730 to CAD 880 across two listings. That's a CAD 150 spread, so shopping around matters. The lower end of that range is more palatable, but even then you're paying a premium for that 96th percentile random performance. If you need the absolute fastest random speeds, the cost might be justified. If you're just gaming casually, there are cheaper options that'll feel nearly identical.

The SanDisk Optimus GXPro 850X lands in our database with a 96th percentile random performance score, which is the headline here. That's the absolute best right now for this type of drive, and it translates to snappy level loads and smooth multitasking. Sequential speeds are no slouch either at 7300 MB/s read and 6600 MB/s write, putting it at 89th percentile overall. But you'll pay for that speed, with affordability sitting at a rough 16th percentile.

This 2TB model uses TLC NAND and skips the DRAM cache, relying on SanDisk's nCache 4.0 tech instead. Endurance is solid at 1200 TBW, good for an 83rd percentile finish. The 5-year warranty and hardware encryption are nice touches. It's built for gaming PCs and creator rigs, not your average office laptop.

Skip this drive if you're on a budget or don't need bleeding-edge random performance. The 16th percentile affordability score means you're paying a lot for speed you might not notice in everyday use. The portable score of 19.7/100 is also a red flag if you plan to use this in a laptop or external enclosure. And with social proof at just 40th percentile, there's not a lot of real-world feedback to lean on. If you're a casual gamer or office user, a mid-range PCIe 4.0 drive will save you money without a noticeable performance hit.

The SanDisk Optimus GXPro 850X is a speed demon with a premium price tag. If you're a creator or gamer who needs the absolute best random performance and can stomach the cost, this drive delivers. The 1200 TBW endurance and 5-year warranty add peace of mind. But the 16th percentile affordability score and limited social proof mean you should do your homework before buying. For most people, a slightly slower drive at a much lower price will be the smarter play.