ADATA Legend 860 2 TB: DRAMless Gen4 NVMe with Flagship Write Speeds (2026)

Name: ADATA Legend 860 2 TB
Brand: ADATA
SKU: adata-legend-860-2-tb
Rating: 3.5 (33 reviews)

Posted on July 18, 2026 by Raymond Chen

The ADATA Legend 860 2 TB is the flagship capacity in ADATA's entry-level Gen4 line, delivering 5,000 MB/s writes from a DRAMless IG5220 platform with enough endurance and PS5 compatibility to outrun its price tag.

ADATA Legend 860 2 TB: DRAMless Gen4 NVMe with Flagship Write Speeds

Controller & Memory

The ADATA Legend 860 2 TB runs on InnoGrit's IG5220, a four-channel DRAMless PCIe 4.0 controller paired with 3D TLC NAND and NVMe 2.0 firmware. Without onboard DRAM the drive borrows a slice of system RAM through the Host Memory Buffer protocol for its flash translation layer mapping tables, a design that trims cost and power draw while keeping everyday random-read responsiveness competitive with cached alternatives. The PCB is a single-sided M.2 2280 board thin enough for ultrabooks and the PlayStation 5 expansion bay, and ADATA includes a metal heatspreader with pre-applied thermal adhesive in the box. The Legend 860 sits at the entry tier of ADATA's Gen4 stack below the Legend 900 and Legend 960 Max, and this 2 TB variant is the performance flagship of the line with 5,000 MB/s sequential writes, the highest in the family.

The Legend 860 ships in three capacities: 500 GB, 1 TB, and 2 TB, with sequential writes scaling from 3,000 MB/s at the entry capacity through 4,000 MB/s at 1 TB to 5,000 MB/s here at 2 TB, while all three share the same 6,000 MB/s peak read speed. ADATA originally launched the drive with QLC NAND and subsequently revised it to 3D TLC, which doubled endurance across the stack. The 2 TB variant carries 1,200 TBW of rated endurance, giving it enough write headroom for a large game library, moderate video ingest, or years of OS and application duty without approaching the endurance ceiling. The single-sided PCB and included heatspreader make it a drop-in upgrade for most desktops, thin-and-light laptops, and the PS5 expansion slot, where it clears Sony's 5,500 MB/s read-speed requirement without a third-party cooler.

At the 2 TB capacity the closest competitors are the WD Blue SN580, Crucial P3 Plus, and Kingston NV3, all DRAMless Gen4 drives aimed at the same value-conscious buyer. Against those the Legend 860 distinguishes itself with a five-year warranty, the IG5220's mature firmware pedigree across multiple drive families, and the TLC NAND on current production that sidesteps the sustained-write pitfalls of QLC alternatives at this price point. The WD Blue SN580 2 TB offers comparable read speeds and a similar HMB architecture, while the Crucial P3 Plus 2 TB competes on warranty and endurance but uses QLC NAND with lower post-cache write throughput.

Storage Comparisons:

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Legend 860 Performance & Benchmarks

At 6,000 MB/s sequential reads and 5,000 MB/s sequential writes, the ADATA Legend 860 2 TB sits at the upper edge of the DRAMless Gen4 segment. The 6,000 MB/s read ceiling is shared across all Legend 860 capacities, but the 5,000 MB/s write rating is exclusive to the 2 TB variant and reflects the combination of more NAND dies available for parallel writes and a larger SLC write cache. Independent testing of the 1 TB sibling by Back2Gaming found that the IG5220 controller exceeds its rated sequential numbers in CrystalDiskMark, clearing 6,300 MB/s reads on the smaller capacity, and the 2 TB should track similarly on reads with a higher write ceiling thanks to the extra NAND parallelism.

Performance comparison

ADATA Legend 860 2 TB vs M.2 4.0 x 4 peers

Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 4.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.

Patriot Viper PV593 1 TB: 14,500 MB/s read, 14,000 MB/s write
Patriot Viper PV593 2 TB: 14,500 MB/s read, 14,000 MB/s write
Patriot Viper PV593 4 TB: 14,500 MB/s read, 14,000 MB/s write
Patriot Viper PV573 2 TB: 14,000 MB/s read, 12,000 MB/s write
ADATA Legend 860 2 TB (this drive): 6,000 MB/s read, 5,000 MB/s write

The SLC write cache on the 1 TB holds roughly 268 GB before exhaustion, and on the 2 TB the cache is at least as large and likely larger, though no independent cache-exhaustion test has been published for this specific capacity. Once the cache fills, writes settle to the native TLC rate, which on a four-channel DRAMless controller drops into the low triple-digit MB/s range under sustained load. For the workloads this capacity is bought for, OS migration, game installs, and large application downloads fit comfortably inside the SLC window and the drive recovers quickly at idle. In a PlayStation 5 the console's internal benchmark averages around 5,000 MB/s, consistent with the PS5's own storage controller ceiling, and game load times are indistinguishable from pricier Gen4 alternatives. The drive runs cool by Gen4 standards and the included heatspreader handles typical desktop and console thermals without issue, though a motherboard slot with active heatsink coverage remains the safer choice for sustained write sessions.

ADATA Legend 860 vs Competitors

See how the Legend 860 stacks up against other M.2 4.0 x 4 drives in our database:

Compare with rival drives:

PNY XLR8 CS3040 2 TB Micron 3400 2 TB Crucial P5 Plus 2 TB

Endurance, TBW & Warranty

ADATA covers the Legend 860 2 TB with a five-year limited warranty that ends early if the 1,200 TBW endurance rating is exceeded. That TBW figure scales from the 640 TBW rating confirmed for the 1 TB variant by Back2Gaming's May 2026 review and reflects the TLC revision that doubled endurance from the original QLC launch ratings. At a typical consumer workload of 20 GB of writes per day the 2 TB would need roughly 164 years to reach its endurance limit, so in practice the five-year warranty term expires long before the NAND approaches its write ceiling. Even at a heavier 50 GB per day the drive clears 65 years, far beyond any realistic service life for a consumer SSD. ADATA rates the Legend 860 at up to 1.5 million hours mean time between failures, a population-level reliability statistic rather than a lifespan guarantee for an individual unit. The included heatspreader uses aggressive thermal adhesive that is effectively permanent once mounted, so builders planning to use a motherboard M.2 heatsink should skip the included spreader.

ADATA Legend 860 2 TB Specifications

Category	Value
Capacity [?]	2 TB
Interface [?]	M.2 4.0 x 4
Controller [?]	InnoGrit IG5220
Memory type [?]	3D TLC
DRAM [?]	No
Read speed (MB/s) [?]	6000
Write speed (MB/s) [?]	5000
Read IOPS [?]	6000000
Write IOPS [?]	5000000
Endurance (TBW) [?]	1200
MTBF (million hours) [?]	1500000
Warranty (years) [?]	5

Verdict: Is the Legend 860 Worth It in 2026?

The ADATA Legend 860 2 TB is the capacity to buy in this line if write speed matters. At 5,000 MB/s it delivers a full 1,000 MB/s more sequential write throughput than the 1 TB variant and 2,000 MB/s more than the 500 GB, closing much of the gap to DRAM-cached Gen4 alternatives while staying in the entry-level price band. Buyers building a gaming desktop or upgrading a PS5 with a single large drive get a single-sided, cool-running Gen4 module with a five-year warranty, 1,200 TBW of endurance, and read speeds that clear Sony's published requirements. Skip this drive if sustained write throughput is the primary workload: post-cache writes on a four-channel DRAMless controller are not competitive with DRAM-cached alternatives for heavy video ingest or scratch-disk duty. The closest alternative at 2 TB is the WD Blue SN580, which offers comparable read speeds and a similarly mature HMB platform, or the Crucial P3 Plus for buyers willing to trade post-cache write speed for a lower entry price. The verdict on the ADATA Legend 860 2 TB is a well-rounded entry-level Gen4 drive whose 2 TB variant earns its flagship billing with write speeds that outrun the budget positioning.

+ Pros

6,000 MB/s sequential reads over PCIe 4.0
5,000 MB/s sequential writes, the fastest in the Legend 860 line
1,200 TBW endurance with five-year warranty
Single-sided M.2 2280 fits ultrabooks and PS5
TLC NAND on current production revision
Included metal heatspreader in the box
InnoGrit IG5220 controller with NVMe 2.0 and mature firmware

- Cons

DRAMless HMB design limits sustained write throughput
Post-cache write speeds drop into low triple-digit MB/s
Heatspreader adhesive is difficult to remove once applied
No AES 256-bit hardware encryption support
ADATA does not publish official IOPS ratings for this drive

3.5 / 5 · 33 votes

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Video Review

ADATA LEGEND 860 - 2TB NVMe M.2 SSD - Unboxing

Frequently Asked Questions

The ADATA Legend 860 2 TB handles gaming well, and the 2 TB capacity is a comfortable fit for a modern game library where individual AAA titles routinely exceed 100 GB. The 6,000 MB/s sequential reads over PCIe 4.0 deliver game load times that are indistinguishable from pricier Gen4 drives, and the DRAMless HMB design does not hurt gaming because game loads are predominantly read-bound with minimal sustained writes. DirectStorage-compatible titles benefit from the NVMe 2.0 protocol support, though real-world gains over SATA or PCIe 3.0 are modest outside of a handful of optimized titles. For a gaming desktop on an AM4, AM5, or LGA 1700 platform with a PCIe 4.0 M.2 slot, the Legend 860 2 TB is a strong single-drive solution that avoids the capacity anxiety of smaller budget drives.

The ADATA Legend 860 2 TB meets all of Sony's published requirements for PS5 storage expansion. Sony mandates a PCIe 4.0 NVMe SSD with at least 5,500 MB/s sequential reads and physical dimensions within 110 by 25 by 11.25 millimetres including a heatsink. The Legend 860 delivers 6,000 MB/s reads, and its single-sided M.2 2280 form factor fits the console's expansion bay without clearance issues. The included metal heatspreader keeps the drive within the PS5's thermal envelope, though Back2Gaming's testing of the 1 TB sibling recorded approximately 5,000 MB/s from the console's internal benchmark, which reflects the PS5's own storage controller ceiling rather than a drive limitation. The 2 TB capacity is a practical choice for a growing PS5 game library where 1 TB expansion drives fill up quickly.

The ADATA Legend 860 does not have a physical DRAM cache chip. Instead it uses the NVMe Host Memory Buffer protocol, which allows the drive to borrow a small portion of the host system's RAM for its flash translation layer mapping tables. HMB is standard on entry-level DRAMless Gen4 SSDs and keeps random read latency competitive with DRAM-equipped drives in typical consumer workloads. The trade-off is that sustained write performance under heavy queue depths is lower than a DRAM-cached drive because the mapping table lookups share PCIe bandwidth with user data transfers. For operating system duty, game loads, and general productivity, HMB is functionally transparent, and the cost savings from omitting a DRAM package are what make the Legend 860 an affordable Gen4 option.

The ADATA Legend 860 2 TB carries a 1,200 TBW endurance rating under the current TLC production revision. This figure scales from the 640 TBW rating confirmed for the 1 TB variant by Back2Gaming's May 2026 review, which documented a TLC NAND revision that doubled endurance from the original QLC launch version. At a typical consumer write workload of 20 GB per day, the 2 TB would need roughly 164 years to reach 1,200 TBW, so the five-year warranty term expires long before the NAND approaches its write endurance limit. The 1,200 TBW rating is strong within the entry-level Gen4 segment and provides enough headroom for a large game library, moderate video ingest, and years of OS and application duty without concern.

The ADATA Legend 860 2 TB includes a thin metal heatspreader in the box, and in most desktop and PS5 installations that is sufficient. The IG5220 controller runs relatively cool by Gen4 standards, and Back2Gaming's testing of the 1 TB sibling found no thermal throttling under typical gaming and productivity workloads with the included spreader. The caveat is the heatspreader's pre-applied thermal adhesive, which is aggressive and effectively permanent once mated to the drive. If the target motherboard has a built-in M.2 heatsink with a thermal pad, it is generally better to skip the included spreader and use the motherboard solution instead. In a laptop, the drive's 2.15 mm bare thickness means it fits even in tight slots, and the modest thermal output of the IG5220 platform makes a dedicated heatsink inessential for most thin-and-light chassis.

The 2 TB ADATA Legend 860 is the fastest writer in the line by a meaningful margin. All three capacities share the same 6,000 MB/s peak read speed and the same IG5220 controller, but sequential write ratings differ sharply: 3,000 MB/s at 500 GB, 4,000 MB/s at 1 TB, and 5,000 MB/s at 2 TB. The 2 TB also carries 1,200 TBW of endurance, double the 1 TB's 640 TBW and nearly four times the 500 GB's 320 TBW. The SLC write cache scales with capacity and is largest on the 2 TB, giving it more headroom before post-cache speeds kick in. For read-heavy workloads such as game loads the difference between capacities is negligible, but for any task involving large contiguous writes the 2 TB is materially faster than its smaller siblings and is the clear pick if the budget allows.

The ADATA Legend 860 2 TB and WD Blue SN580 2 TB occupy the same entry-level DRAMless Gen4 segment and are close competitors. Both use Host Memory Buffer instead of onboard DRAM, both carry five-year warranties, and both deliver 6,000 MB/s-class sequential reads. The Legend 860 2 TB holds an edge in sequential writes at 5,000 MB/s, though the SN580 2 TB is typically in the same range and independent benchmarks tend to put them within a few hundred MB/s of each other. The Legend 860 counters with an included heatspreader, which the SN580 lacks, and the IG5220 controller has a broader track record across multiple drive families. Endurance is comparable at around 1,200 TBW. For gaming, OS duty, and general productivity the real-world difference between the two is small, and the choice often comes down to whichever is priced lower on the day.