SanDisk 4TB SSD PCIe 4.0 NVMe M.2 2280

The SanDisk Optimus GX SDSP71400TAN is a 4TB PCIe 4.0 NVMe SSD with excellent random performance and strong sequential speeds. It's a great fit for laptops and gaming rigs that need big, fast storage. Just watch the price, it swings from USD 800 to USD 955 depending on the retailer.

Sequential reads hit 7,250 MB/s and writes reach 6,900 MB/s, which puts this drive in the top tier of PCIe 4.0 SSDs. In practice, that means large file transfers and game installs will fly. Random performance is where this drive really shines. SanDisk rates it at 1,000K random read IOPS and 1,400K random write IOPS, and our data puts it in the 96th percentile for random performance. That's the kind of responsiveness you feel when booting Windows, launching apps, or loading into a game with lots of small asset files.

The DRAM-less design is interesting here. Historically, DRAM-less drives struggled with sustained writes and consistency, but SanDisk's nCache technology and the 8th gen BiCS TLC NAND keep things competitive. You won't get the absolute peak sustained write performance of a drive with dedicated DRAM, but for gaming and everyday use, most people won't notice. The endurance score sits at the 57th percentile, which is about average for this class. Not a standout, but not a red flag either.

The Western Digital Black SN850X is the most obvious rival here, and it's a close fight. The SN850X has a DRAM cache and typically edges out the Optimus GX in sustained writes, but the SanDisk drive counters with slightly better random read numbers in our testing. Both are excellent gaming drives, so it often comes down to price and brand preference. The Samsung 9100 PRO is a Gen 5 drive, so it's faster on paper, but you'll pay more and need a compatible motherboard to see the benefit. For most PCIe 4.0 systems, the Optimus GX is the more practical choice.

The Kingston FURY Renegade G5 and Crucial T500 are also worth a look. The T500 often undercuts the Optimus GX on price while delivering similar real-world performance, though its random write IOPS are lower. The FURY Renegade G5 is a strong all-rounder with a DRAM cache, but it can run hotter under sustained load. The Seagate FireCuda 530R is another solid alternative, especially if you want a drive with a longer endurance rating. Against all of these, the Optimus GX holds its own on speed and capacity, but it's not the clear winner on price or features.

Pricing on the SanDisk Optimus GX 4TB is all over the place right now. We're seeing USD 800 to USD 955 across two US listings, which is a USD 155 spread depending on where you buy. That's a meaningful gap, so it pays to shop around before pulling the trigger. At the low end of that range, this drive is competitive with other high-capacity PCIe 4.0 options. At the high end, you're paying a premium for the SanDisk name and the strong random performance. The affordability percentile is just 8th, which tells you this drive is priced near the top of its class. If you can find it closer to USD 800, the value proposition improves considerably. The CAD listing at CAD 1,140 is a single data point, but it suggests Canadian buyers may face a similar premium.

The SanDisk Optimus GX SDSP71400TAN is a 4TB M.2 2280 PCIe 4.0 NVMe SSD aimed squarely at gamers and laptop users who want a big, fast drive without breaking into Gen 5 territory. It sits in the upper mid-range of the PCIe 4.0 market, with sequential reads up to 7,250 MB/s and writes up to 6,900 MB/s on the 1TB and 2TB models. The 4TB version we're looking at here keeps the same controller and NAND but the headline numbers are what most shoppers will see when comparing internal SSDs at this capacity.

Is the SanDisk Optimus GX good for gaming? Based on our database, yes. It lands in the 91st percentile for speed and 96th for random performance, which means load times and texture streaming should feel snappy. It also supports Microsoft DirectStorage, so games built for that will benefit. The drive uses SanDisk's 8th generation BiCS TLC 3D NAND and is DRAM-less, which is worth noting for anyone who assumes all high-end drives carry a DRAM cache.

For laptop owners, this is one of the better PCIe 4.0 options we've tracked. Our laptop score for the Optimus GX is 81 out of 100, helped by a power-efficient architecture that SanDisk claims will stretch battery life during long gaming or creative sessions. The 4TB capacity is a big draw too, since you can dump a huge Steam library on it and still have room for video projects.

Skip the Optimus GX if you're building a desktop workstation that does heavy sustained writes, like 4K video editing or large database work. The DRAM-less design will show its limits there, and a drive like the WD Black SN850X or Seagate FireCuda 530R with a DRAM cache and higher endurance rating is a better fit. Also skip it if you're on a tight budget. The affordability percentile is just 8th, and there are cheaper 4TB PCIe 4.0 drives like the Crucial T500 that deliver most of the real-world performance for less money. And if you need a portable external drive, this isn't it. Our portable score for this drive is a dismal 21.2 out of 100, so look at a proper external SSD instead.

Should you buy the SanDisk Optimus GX 4TB? If you need a big, fast PCIe 4.0 drive for a laptop or gaming rig and you find it at the lower end of that USD 800 to USD 955 range, it's a solid pick. The random performance is genuinely excellent, and the 4TB capacity means you won't be uninstalling games to make room anytime soon. The DRAM-less design is a compromise, but SanDisk's nCache tech does a good job masking it for typical workloads.

That said, this isn't a no-brainer. The endurance is average, the feature set is unremarkable, and the price can drift into territory where a DRAM-equipped competitor makes more sense. If you're building a desktop and care about sustained write performance, the WD Black SN850X or Crucial T500 might serve you better. For laptop users who want capacity, speed, and power efficiency in one package, the Optimus GX is one of the better options we've tested.