Addlink S95 4 TB SSD Review — A Phison E18 Flagship with Max Capacity (2026)

Name: Addlink S95 4 TB
Brand: Addlink
SKU: addlink-s95-4-tb
Rating: 3.8 (41 reviews)

Posted on July 21, 2026 by Raymond Chen

The Addlink S95 4 TB is one of the highest-capacity Phison E18 drives on the market, pairing a proven eight-channel controller with Micron 96-layer TLC and a 2,800 TBW endurance rating that outlasts most PCIe 4.0 competitors.

Addlink S95 4 TB SSD Review — A Phison E18 Flagship with Max Capacity

Controller & Memory

The Addlink S95 4 TB sits at the top of the S95 capacity stack, built around the Phison PS5018-E18 eight-channel controller that defined the PCIe 4.0 flagship tier from 2021 onward. Underneath is Micron's 96-layer 3D TLC NAND — the B27B generation — paired with a DDR4-2666 DRAM buffer whose size scales with capacity, so the 4 TB carries enough cache to map every sector without relying on host memory. The recipe is the Phison E18 reference platform, shared with drives like the Corsair MP600 Pro, Sabrent Rocket 4 Plus, and Team Group Cardea A440 Pro, which means the S95 inherits a mature, well-characterised controller whose thermal behaviour and performance envelope are thoroughly documented across dozens of independent reviews of its platform siblings.

Addlink ships the S95 in 1 TB, 2 TB, 4 TB, and an unusually large 8 TB variant, making it one of the few consumer M.2 2280 drives to offer 8 TB on a Gen4 bus. Each step up scales endurance linearly at roughly 700 TBW per terabyte, and sequential speeds peak at the 2 TB and 4 TB capacities before dipping slightly on the 8 TB, which trades a few hundred megabytes per second of write throughput for density. The 4 TB is the practical sweet spot for a single-slot game library, a video project drive, or a local workstation cache that avoids juggling multiple smaller SSDs. At 4 TB the PCB is double-sided with NAND packages on both faces, so it fits standard desktop M.2 slots and most gaming laptops with enough Z-height but will not slide into the thinnest ultrabooks or a Steam Deck.

Competition for the Addlink S95 4 TB is the usual Gen4 flagship field. Samsung's 990 Pro 4 TB is faster on paper and in practice, with lower latency and marginally higher throughput, at a price premium. Western Digital's WD Black SN850X 4 TB matches the S95's endurance class with a different in-house controller and a longer retail track record. Among other Phison E18 drives, the Corsair MP600 Pro LPX 4 TB is the nearest sibling and often the one to compare on price, since the hardware underneath is nearly identical and the differentiator comes down to brand support and bundled accessories.

Storage Comparisons:

Best 4 TB SSD Best PCIe 4.0 SSD Drive Best Deal of 1 TB SSDs NVME

S95 Performance & Benchmarks

The Addlink S95 4 TB is manufacturer-rated for up to 7,100 MB/s sequential reads and 6,800 MB/s sequential writes over PCIe 4.0 x4, placing it in the upper tier of Gen4 drives alongside the WD Black SN850X and within striking distance of the Samsung 990 Pro. Random performance is rated at up to 1,000,000 read IOPS and 1,000,000 write IOPS, the practical ceiling for the Phison E18 platform and more than enough to make desktop workloads, game level loads, and application launches feel instantaneous.

Performance comparison

Addlink S95 4 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
Addlink S95 4 TB (this drive): 7,100 MB/s read, 6,800 MB/s write

In real-world use, the difference between the S95 and a Samsung 990 Pro on a game load is measured in fractions of a second, since most titles are still CPU-bound during level transitions rather than storage-bound. The 4 TB capacity earns its keep on sequential work: scrubbing 4K timelines, moving hundred-gigabyte project folders, or feeding a DirectStorage texture stream benefits from the full 7 GB/s bandwidth in a way that a 1 TB boot drive rarely does. Like every Phison E18 drive, the S95 uses an SLC write cache that absorbs writes at the full rated speed until it fills, after which sustained writes settle to the native TLC rate of roughly 1,500 to 2,000 MB/s depending on temperature and workload. The 4 TB model carries a larger absolute cache than the 1 TB or 2 TB simply because it has more NAND dies to draw from, so cache exhaustion under normal consumer use is rarer. Independent reviews of the 2 TB S95 at TechPowerUp and TweakTown found it competitive with other E18 drives, delivering within a few percent of the Corsair MP600 Pro and Sabrent Rocket 4 Plus in both synthetic benchmarks and real-world application traces. No independent benchmarks of the 4 TB variant exist, but the controller and NAND are identical to the 2 TB, so performance should scale predictably with the extra parallelism from the doubled NAND packages.

Addlink S95 vs Competitors

See how the S95 stacks up against other M.2 4.0 x 4 drives in our database:

Compare with rival drives:

Sabrent Rocket 4 Plus 4 TB Corsair MP600 Pro XT Hydro X 4 TB Acer FA200 4 TB

Endurance, TBW & Warranty

Addlink covers the S95 4 TB with a five-year limited warranty that ends when either the five-year term expires or the drive exhausts its 2,800 TBW endurance rating, whichever comes first. That 2,800 TBW figure follows a linear 700 TBW-per-terabyte scaling across the S95 line: 700 TBW on the 1 TB, 1,400 TBW on the 2 TB, 2,800 TBW on the 4 TB, and 5,600 TBW on the 8 TB. At a heavy consumer workload of 50 GB of writes per day, the 4 TB drive would need over 150 years to reach the endurance limit, so the NAND will outlast any system it is installed in and the warranty term is the practical constraint. Addlink rates the S95 at up to 1.8 million hours MTBF, a statistical figure describing expected failure rates across a large population of drives, not a lifespan prediction for an individual unit. Warranty service is handled through Addlink directly, and the drive ships bare with no heatsink in the box, so users should confirm their motherboard includes M.2 cooling before purchase — sustained write throttling on the E18 platform without heatsink contact is well documented and can cut sequential throughput by a third or more under heavy load.

Addlink S95 4 TB Specifications

Category	Value
Capacity [?]	4 TB
Interface [?]	M.2 4.0 x 4
Controller [?]	Phison PS5018-E18 8Channel
Memory type [?]	Micron 96-L TLC
DRAM [?]	Yes
Read speed (MB/s) [?]	7100
Write speed (MB/s) [?]	6800
Read IOPS [?]	1000000
Write IOPS [?]	1000000
Endurance (TBW) [?]	2800
MTBF (million hours) [?]	1800000
Warranty (years) [?]	5

Verdict: Is the S95 Worth It in 2026?

The Addlink S95 4 TB makes sense for buyers who need 4 TB of fast PCIe 4.0 storage in a single M.2 slot and find the S95 priced below equivalent Phison E18 drives like the Corsair MP600 Pro LPX or Sabrent Rocket 4 Plus. The hardware underneath is a known quantity — the Phison E18 controller with Micron 96-layer TLC has been on the market since 2021 and there are no surprises left — and the 2,800 TBW endurance rating is high enough that write exhaustion is a non-issue for any consumer workload. Skip the S95 for the lowest possible latency or highest burst throughput, where Samsung's 990 Pro 4 TB and WD's SN850X 4 TB pull slightly ahead on their in-house controllers, or on a motherboard that lacks an M.2 heatsink, because the E18 controller throttles noticeably under sustained writes without cooling. Also pass on it for single-sided compatibility in a thin laptop or handheld. The Addlink S95 4 TB is a competent, unremarkable Gen4 workhorse that trades on capacity and endurance rather than benchmark leadership, and at the right price that is a trade worth making.

+ Pros

2,800 TBW endurance on the 4 TB model
Phison E18 controller with dedicated DRAM cache
Up to 7,100 MB/s sequential reads over PCIe 4.0
Lineup scales to 8 TB, among the largest consumer M.2 capacities
Five-year warranty with more endurance headroom than most Gen4 rivals
Mature, widely reviewed Phison E18 platform with predictable behaviour

- Cons

No included heatsink and E18 controller runs hot under sustained load
Double-sided PCB may not fit slim laptops or handhelds
Samsung 990 Pro and WD SN850X outpace it in latency-sensitive workloads
Smaller brand with less retail and firmware support presence than Samsung or WD
Write speed drops to native TLC rate after SLC cache exhausts

3.8 / 5 · 41 votes

Buy this or similar SSD Storage:

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Video Review

Corsair MP400 GEN3 2TB vs Addlink S95 GEN4 2TB Test Benchmark Game Loading

Frequently Asked Questions

The Addlink S95 4 TB is very good for gaming, though the advantage is capacity rather than load times. Game level loads at PCIe 4.0 speeds are already near the point of diminishing returns, and the difference between this drive and a Samsung 990 Pro is measured in fractions of a second in most titles. The 4 TB capacity is the real gaming asset: it holds a large Steam library, several Call of Duty installs, and a modded Skyrim setup without forcing compromises. DirectStorage-enabled titles that stream textures straight from the SSD benefit from the full 7,100 MB/s read bandwidth, though API adoption is still limited. For a pure gaming build on a tighter budget, a 2 TB PCIe 4.0 drive saves money without a perceptible performance loss.

The Addlink S95 4 TB meets Sony's published requirements for the PlayStation 5 expansion slot and is listed as PS5 compatible by Addlink itself. Sony requires a PCIe 4.0 NVMe M.2 SSD with a recommended sequential read speed of at least 5,500 MB/s and physical dimensions within 110 by 25 by 11.25 millimetres including the heatsink. The S95 4 TB clears the speed bar at 7,100 MB/s reads and fits the M.2 2280 length and width envelope. The key caveat is the heatsink: the S95 ships bare, and the PS5 demands a cooler that keeps the entire assembly under the 11.25 mm height limit. Because the S95 is a double-sided PCB, a specifically low-profile third-party heatsink such as the Sabrent PS5 cover or the EKWB M.2 heatsink is needed, and the user must budget for it separately.

The Addlink S95 4 TB carries a 2,800 TBW endurance rating, the amount of data the drive is warrantied to write over its lifetime. This follows a linear 700 TBW-per-terabyte scaling across the S95 family: the 1 TB gets 700 TBW, the 2 TB gets 1,400 TBW, and the 8 TB gets 5,600 TBW. For perspective, a heavy consumer workload of 50 GB of writes per day would take over 150 years to exhaust the 2,800 TBW on the 4 TB model, so the NAND endurance is not a practical limitation. The five-year warranty term will expire long before the flash wears out under any normal desktop, gaming, or content creation use.

The Addlink S95 4 TB needs a heatsink for sustained write workloads, and it ships without one in the box. The Phison E18 controller draws enough power under load that the drive will thermal-throttle if left bare in a slot with no airflow, dropping write speeds well below the rated 6,800 MB/s. Most modern desktop motherboards include a built-in M.2 heatsink that handles this adequately, and users building in a case with decent airflow may never see throttling even under heavy use. The risk is highest in laptops or compact cases where the M.2 slot sits in a dead air zone with no active cooling. For PlayStation 5 use, a specifically low-profile heatsink is required to stay within Sony's 11.25 mm height limit, since the S95's double-sided PCB plus a standard heatsink can exceed the clearance.

The Samsung 990 Pro 4 TB has the edge over the Addlink S95 4 TB in nearly every measurable dimension: higher sequential reads at 7,450 MB/s, higher random IOPS, lower latency, and better power efficiency from Samsung's in-house Pascal controller on a more advanced process node. The gap is real but its practical impact depends on workload: game load times are indistinguishable, Windows boot and application launch feel identical, and only sustained sequential transfers or latency-sensitive database work show a measurable difference. Where the S95 wins is endurance headroom at 2,800 TBW versus the 990 Pro's 2,400 TBW and, depending on retail pricing, cost per gigabyte. Samsung's 990 Pro is objectively the better SSD; the S95 is the better value when priced well below it.

The Addlink S95 4 TB is well suited to video editing, particularly as a project or media drive rather than a boot drive. The combination of 7,100 MB/s sequential reads, a DRAM cache that prevents stutter during timeline scrubbing, and 4 TB of capacity makes it practical to store raw 4K footage and project files on the same volume without spanning across multiple drives. The SLC cache on the 4 TB model is large enough that even a 200 GB media ingest rarely exhausts it, so writes stay at full speed for typical 4K video workflows. For 8K raw or multi-camera ingest, sustained write speeds eventually settle to the native TLC rate once the cache fills, and a Gen5 drive like the Crucial T705 would handle that workload with more headroom. For most 4K editing the S95 is entirely adequate.

Yes, the Addlink S95 4 TB includes a dedicated DRAM cache. The Phison PS5018-E18 controller uses external DDR4-2666 DRAM chips to store the logical-to-physical mapping table that tracks where every piece of data lives on the NAND. On the 4 TB model the DRAM buffer is sized to map the full capacity without relying on host memory buffer, which keeps random access latency low and consistent even under mixed read and write loads. This is standard for the Phison E18 platform and distinguishes the S95 from DRAM-less Gen4 drives like the WD Blue SN580 or Kingston NV3, which use HMB to borrow a slice of system RAM instead and can show higher tail latency under sustained random I/O.