Sandisk's NAS 800 line tops out at 14,000TB of write endurance — roughly three times the per-gigabyte norm for consumer drives — and prices to match, with the 7.68TB flagship listed at $2,749.99. Tom's Hardware tested the 1.92TB model at $699.99 and concluded the drive is "the premier NVMe SSD for NAS, with high endurance, high sustained write performance, and excellent 4KB random latencies, only held back by its price."

The premium over the drive's closest relative is steep. Against WD Black SN8100 street prices at the time of writing, the NAS 800 costs roughly 45% to 65% more. Compared with the same hardware sold as the Sandisk Optimus GX Pro 8100 — the drive's direct predecessor — the premium lands between 27% and 29%. Tom's Hardware attributes most of that gap to the endurance rating rather than the NAS-specific tuning.

What hardware does the NAS 800 use?

Under the hood, the NAS 800 is a specialized version of the Optimus GX Pro 8100, formerly the WD Black SN8100. Key components include:

• Controller: Silicon Motion SM2508, an eight-channel PCIe 5.0 part
• NAND: Sandisk 218-layer BiCS8 TLC 3D CBA flash
• DRAM: 2GB LPDDR4, following the 1:1,000 DRAM-to-NAND ratio
• Interface: PCIe 5.0 x4 / NVMe 2.0
• Security: TCG Opal self-encryption
• Warranty: five years

The SM2508 labeling is partially obscured — the package reads "250800" in a SanDisk-style proprietary marking — but Tom's Hardware identifies it as the SMI controller, calling it a high-end design with generally excellent performance and power efficiency. The BiCS8 flash draws similar praise: good all-around performance, very good latency, and very good power efficiency. As the review puts it, "this is world-class hardware, and the price reflects that."

How fast is it?

Sequential performance reaches 14,900 MB/s reads and up to 13,200 MB/s writes, with random performance up to 2,300K read IOPS and 2,100K write IOPS depending on capacity. Peak overall performance should come at the 3.84TB capacity, which posts 2,300K/2,000K random IOPS.

The oddball capacities — 960GB, 1.92TB, 3.84TB, and 7.68TB instead of consumer-standard 1TB/2TB/4TB/8TB — come from reserving more spare flash as overprovisioning, which improves endurance. The 7.68TB model is the most notable addition, as capacities above 4TB have been difficult to find outside enterprise channels. Only the 7.68TB drive is double-sided; the other three are single-sided M.2 2280 designs.

What does the endurance rating mean in practice?

The TBW ratings scale linearly across the line: 1,750TB at 960GB, 3,500TB at 1.92TB, 7,000TB at 3.84TB, and 14,000TB at 7.68TB. That works out to about one full drive write per day over the five-year warranty period — a workload level the reviewer considers "all but required for a drive of this type" and worthy of the price tag for endurance-focused buyers.

Power draw is the one weak spot. The 1.92TB drive's 3.3V / 2.7A rating puts it at around 9W, between its 9.50W maximum power state and its 6.5W/6.4W average draw, with a reported active draw of 7.52W. Tom's Hardware notes the small pseudo-SLC cache and NAS optimization should push real-world consumption below that figure, letting the drive run cooler.

Where does the drive fit in Sandisk's lineup?

The NAS 800 targets NAS appliances first, with home and small-business servers as the reference use case — a positioning similar to WD's Red line, including the WD Red SN700. The review also flags it as a credible fit for high-end desktop and enthusiast workstations.

The launch continues a busy stretch for Sandisk's storage business, which recently released the Optimus GX Pro 850P for the PS5 and is bringing back SATA SSDs in the 320 and 520 series. The company has made clear it wants to support the broader consumer market.

Software support mirrors WD's ecosystem. The Sandisk Dashboard provides SMART and health monitoring, optional feature toggles, and firmware updates, while an OEM version of Acronis True Image handles backup and drive cloning.

Below-average power efficiency and the 27-65% price premium remain the trade-offs, but for buyers who need roughly triple consumer-grade endurance in a single M.2 drive — especially at 7.68TB — the NAS 800 currently has little direct competition outside enterprise product lines.