SanDisk 2TB SSD PCIe 4.0 NVMe M.2 2280

The Optimus GX PRO hits 7,300 MB/s reads and 6,600 MB/s writes with a monster 4,800 TBW endurance rating, putting it in the 98th percentile for longevity. But it's DRAM-less and priced between USD 420 and USD 582, which lands it in the 16th percentile for affordability. Great endurance, good speed, questionable value.

Sequential performance is genuinely top-shelf. 7,300 MB/s read and 6,600 MB/s write put this drive in the 89th percentile for speed, which means it's faster than the vast majority of PCIe 4.0 drives out there. For game loads and large file transfers, you'll feel the difference. The random IOPS story is even more impressive: 1.2M read and 1.2M write puts it at the 96th percentile, which is one of the best on the market. That's the number that matters for snappy OS responsiveness and multitasking while a game installs in the background.

The DRAM-less design is the elephant in the room. Most drives at this performance level include a DRAM cache to handle the mapping tables that tell the drive where data lives. SanDisk's nCache 4.0 uses a chunk of the TLC NAND as an SLC cache instead, which works fine for bursty workloads but can get bogged down when the cache fills. For gaming and typical creative work, you probably won't notice. For sustained 4K video scrubbing or database work, a DRAM-equipped drive like the SN850X will hold up better.

Against the Western Digital Black SN850X, the Optimus GX PRO trades blows on sequential speed but loses on sustained random performance due to the missing DRAM. The SN850X also has a stronger track record and more reviews. The Samsung 9100 PRO is a PCIe 5.0 drive, so it'll smoke this on paper, but you'll pay for the privilege and need a compatible motherboard. The Crucial T500 is the value play here: similar real-world performance for noticeably less money. The Kingston FURY Renegade G5 and Seagate FireCuda 530R both offer DRAM-equipped designs at competitive prices, which makes the SanDisk's DRAM-less choice harder to swallow. Where the Optimus GX PRO wins is endurance. None of these competitors come close to 4,800 TBW at 2TB.

At USD 420 to USD 582, this drive is not cheap. The 16th percentile affordability ranking tells the story: you're paying near the top of the market for a 2TB PCIe 4.0 drive. The good news is that the endurance rating justifies some of that premium. 4,800 TBW is roughly double what most competitors offer at this capacity, so if you're the type who rewrites their entire drive every month, the cost per terabyte written is actually reasonable. If you're just installing games and leaving them there, you're overpaying. The USD 420 listing is the one to grab if you're set on this drive; the USD 582 listing is hard to justify when the SN850X and T500 both undercut it.

The SanDisk Optimus GX PRO hits 7,300 MB/s sequential reads and 6,600 MB/s writes on the 2TB model, which puts it in the top tier of PCIe 4.0 drives we've tested. That's fast enough to load a 100GB game in roughly 15 seconds, assuming your CPU can keep up. The endurance story is even better: 4,800 TBW on this drive means you could write 2.6TB every single day for five years and still be under warranty. That's the kind of number that makes us double-check the spec sheet.

But here's the catch. This is a DRAM-less drive, which usually means random performance takes a hit under sustained load. SanDisk leans on nCache 4.0 to paper over that gap, and the 1.2M random read and write IOPS numbers suggest it mostly works. Still, at USD 420 to USD 582 depending on where you shop, you're paying a premium for the SanDisk name and that monster endurance rating. Whether that's worth it depends on how hard you punish your storage.

Skip this drive if you're building a gaming PC on a budget. The USD 420 to USD 582 price range puts it in the 16th percentile for affordability, and you can get 95% of the real-world performance from a Crucial T500 or WD Black SN850X for less money. Also skip it if you need a portable drive: the 20.6/100 portability score is one of the weakest we've seen. And if you do sustained professional video editing or database work, the DRAM-less design will eventually bottleneck under heavy sustained writes. This drive is for people who want maximum endurance and don't mind paying for it.

The SanDisk Optimus GX PRO is a weird mix of flagship endurance and mid-tier design choices. The 4,800 TBW rating is genuinely exceptional, and the sequential and random performance numbers are strong enough for any gaming or creative workload. But the DRAM-less architecture and premium pricing make it a tough sell when faster, cheaper, DRAM-equipped alternatives exist. If you're building a workstation that will see heavy daily writes for years, the endurance alone might justify the cost. For everyone else, the SN850X or T500 will deliver a better overall experience for less money.