# Addlink S95 8 TB SSD Review — The Phison E18 Platform at Maximum Capacity (2026)

The Addlink S95 8 TB pushes the Phison E18 reference platform to its density limit, packing eight terabytes of Micron 96-layer TLC onto a double-sided M.2 2280 stick backed by 5,600 TBW of endurance — a figure that makes write exhaustion irrelevant for any consumer workload.

Quick answer: The Addlink S95 8 TB is not the fastest Gen4 drive and it does not pretend to be. It is a density play: eight terabytes in a standard M.2 2280 slot on PCIe 4.0, backed by 5,600 TBW of endurance that makes the warranty term the limiting factor rather than the NAND. For anyone who needs a single-slot solution that swallows a complete game library, a multi-year video archive, or an entire creative workflow without spanning across drives, the S95 8 TB is one of very few options at retail and the Phison E18 platform it rides on has been publicly tested and debugged since 2021. Buyers who need the lowest possible latency or the highest burst throughput should look to the Samsung 990 Pro or WD SN850X, but both cap at 4 TB, and matching the S95's capacity means buying two drives and occupying two slots — which may not be an option on an ITX board or a fully populated ATX build. Skip the S95 8 TB if the motherboard lacks an M.2 heatsink or the case has no airflow over the M.2 area, because the densely packed double-sided PCB generates real heat under sustained load and needs cooling. Also skip it if single-sided compatibility is required for an ultrabook or handheld. The Addlink S95 8 TB is a capacity-first, endurance-rich Gen4 workhorse for builds where terabytes per slot matter more than a few hundred megabytes per second of benchmark leadership.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 8 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5018-E18 8Channel |
| Memory type | Micron 96-L TLC |
| DRAM cache | Yes |
| Sequential read | 7000 MB/s |
| Sequential write | 6000 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 1000000 |
| Endurance | 5600 TBW |
| MTBF | 1800000 |
| Warranty | 5 years |

## Performance

The Addlink S95 8 TB is manufacturer-rated for up to 7,000 MB/s sequential reads and 6,000 MB/s sequential writes over PCIe 4.0 x4. The read figure keeps it in the upper tier of Gen4 drives, while the write figure reflects the small density penalty of the 8 TB configuration versus the 4 TB sibling at 6,800 MB/s. 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 identical across all S95 capacities because the controller and DRAM architecture do not change.

In real-world use the 8 TB S95 is not the fastest Gen4 drive but it is fast enough that the bottleneck shifts to the rest of the system. Game level loads, application launches, and Windows boot times are indistinguishable from a Samsung 990 Pro or WD SN850X because most consumer workloads are still CPU-bound during transitions rather than storage-bound. The 8 TB capacity earns its keep on bulk sequential work: moving a terabyte of video projects between directories, hosting a DirectStorage-capable game library without juggling drive space, or storing a full Lightroom catalogue that would overflow a 4 TB drive. Like every Phison E18 drive, the S95 uses a dynamic SLC write cache that absorbs writes at the full rated speed until it fills, after which sustained throughput settles to the native TLC rate of roughly 1,500 MB/s depending on temperature. The 8 TB model carries the largest absolute SLC cache in the S95 family simply because it has the most NAND dies to draw from, so cache exhaustion under normal consumer use is rarer still than on the already generous 4 TB variant. Guru3D demonstrated that four S95 8 TB drives in a RAID-0 array can saturate a Gen5 slot at 28 GB/s, confirming the controller and NAND scale linearly across capacity and that the per-drive bottleneck is the Gen4 bus, not the flash. Independent reviews of the 2 TB S95 at TechPowerUp and TweakTown found it competitive with other E18 drives; no independent benchmarks of the 8 TB variant exist, but the hardware is identical to the 2 TB and 4 TB models aside from NAND density, so performance should scale predictably with the additional parallelism of the extra dies.

## Endurance, TBW & Warranty

Addlink covers the S95 8 TB with a five-year limited warranty that ends when either the five-year term expires or the drive exhausts its 5,600 TBW endurance rating, whichever comes first. The 5,600 TBW figure is the product of 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 8 TB drive would need over 300 years to reach the endurance limit, so the NAND wear-out is a non-issue for any desktop, gaming, or content creation workload and the warranty term is the only practical constraint. Among consumer PCIe 4.0 drives, 5,600 TBW is one of the highest endurance ratings available — it rivals entry-level enterprise drives — and it is roughly double the 2,400 TBW of a Samsung 990 Pro 4 TB. 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. Users should confirm their motherboard includes M.2 cooling before installation, because the Phison E18 controller under sustained write load without heatsink contact can thermal-throttle and cut throughput by a third or more.

## Pros and Cons

**Pros:**

- 8 TB on a single M.2 2280 slot, one of very few consumer Gen4 drives at this density
- 5,600 TBW endurance rating, among the highest of any consumer PCIe 4.0 SSD
- Massive SLC write cache from the high NAND die count resists exhaustion
- Phison E18 controller with dedicated DRAM cache for consistent random access latency
- Five-year warranty with endurance headroom that outlasts any practical consumer workload
- Mature, widely reviewed Phison E18 platform shared with Corsair and Sabrent counterparts
**Cons:**

- No included heatsink and the E18 controller runs hot under sustained load
- Double-sided PCB with dense NAND packaging may not fit slim laptops or handhelds
- Slightly slower writes than the 4 TB sibling at 6,000 MB/s vs. 6,800 MB/s
- 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 the SLC cache fills under extreme sustained load


## Verdict

The Addlink S95 8 TB is not the fastest Gen4 drive and it does not pretend to be. It is a density play: eight terabytes in a standard M.2 2280 slot on PCIe 4.0, backed by 5,600 TBW of endurance that makes the warranty term the limiting factor rather than the NAND. For anyone who needs a single-slot solution that swallows a complete game library, a multi-year video archive, or an entire creative workflow without spanning across drives, the S95 8 TB is one of very few options at retail and the Phison E18 platform it rides on has been publicly tested and debugged since 2021. Buyers who need the lowest possible latency or the highest burst throughput should look to the Samsung 990 Pro or WD SN850X, but both cap at 4 TB, and matching the S95's capacity means buying two drives and occupying two slots — which may not be an option on an ITX board or a fully populated ATX build. Skip the S95 8 TB if the motherboard lacks an M.2 heatsink or the case has no airflow over the M.2 area, because the densely packed double-sided PCB generates real heat under sustained load and needs cooling. Also skip it if single-sided compatibility is required for an ultrabook or handheld. The Addlink S95 8 TB is a capacity-first, endurance-rich Gen4 workhorse for builds where terabytes per slot matter more than a few hundred megabytes per second of benchmark leadership.

## Frequently Asked Questions

### Is the Addlink S95 8 TB good for gaming?

The Addlink S95 8 TB is excellent for gaming, and the reason is capacity rather than speed. At 7,000 MB/s reads the drive is deep into diminishing returns for game loads: the difference between this and a Samsung 990 Pro is a fraction of a second in most titles because level transitions are CPU-bound, not storage-bound. The 8 TB capacity is the real win: it holds a massive Steam library, Call of Duty with all texture packs, several large open-world titles, and a modded setup simultaneously without ever needing to uninstall anything. For a pure gaming build where budget is tight, a 2 TB or 4 TB drive saves money with no perceptible performance loss, but for a single-slot gaming library that stores everything, the S95 8 TB is one of the few Gen4 answers.

### Is the Addlink S95 8 TB compatible with the PS5?

The Addlink S95 meets Sony's published requirements for the PlayStation 5 expansion slot and is listed as PS5 compatible by Addlink. 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 8 TB clears the speed requirement at 7,000 MB/s reads, and the 8 TB capacity is an exceptionally large game library drive for the console. The critical caveat is the heatsink: the S95 ships bare, the PS5 requires active cooling, and the double-sided PCB means a standard heatsink may exceed Sony's 11.25 mm Z-height limit. A specifically low-profile third-party heatsink such as the Sabrent PS5 cover or EKWB M.2 heatsink is required, budgeted separately, and must be verified to fit before purchase.

### What is the TBW endurance of the Addlink S95 8 TB?

The Addlink S95 8 TB carries a 5,600 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, the 4 TB gets 2,800 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 300 years to exhaust the 5,600 TBW on the 8 TB model, so NAND endurance is not a practical concern for any desktop, gaming, or content creation workload. The five-year warranty term will expire long before the flash wears out, and 5,600 TBW is one of the highest endurance ratings of any consumer PCIe 4.0 SSD, rivalling entry-level enterprise drives.

### Does the Addlink S95 8 TB need a heatsink?

The Addlink S95 8 TB needs a heatsink for sustained write workloads, and it ships without one in the box. The Phison E18 controller draws significant power under load, and the densely packed double-sided PCB on the 8 TB model concentrates more heat than the lower-capacity variants. Without cooling, the drive will thermal-throttle under sustained writes, dropping throughput well below the rated 6,000 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. The risk is highest in compact cases where the M.2 slot sits in a dead air zone or in laptops without active M.2 cooling. For PlayStation 5 use, a specifically low-profile third-party heatsink is mandatory to stay within Sony's 11.25 mm height clearance.

### How does the Addlink S95 8 TB compare to buying two 4 TB drives?

The Addlink S95 8 TB competes against the practical alternative of buying two 4 TB drives and occupying two M.2 slots. A pair of Samsung 990 Pro 4 TB drives would be faster on latency and burst throughput, cost more, and consume two slots. A pair of WD Black SN850X 4 TB drives would similarly outperform the S95 while consuming two slots. The S95 8 TB wins on slot efficiency: on an ITX board with a single M.2 slot or an ATX board where both slots are already occupied, the single-drive 8 TB solution is the only way to reach that capacity. On endurance the S95 also leads with 5,600 TBW versus the 990 Pro's 2,400 TBW per 4 TB, though the practical difference is irrelevant for consumer workloads. The choice comes down to whether slot count or per-drive throughput matters more, and the S95 8 TB is built for the former.

### What is the SLC cache size on the Addlink S95 8 TB?

Addlink does not publish a specific SLC cache size for the S95 8 TB, but the Phison E18 platform uses a dynamic SLC cache that scales with free space and NAND die count. The 8 TB model carries the largest absolute cache in the S95 family because it has the highest number of NAND dies to draw from for SLC-mode writes. On the 4 TB sibling, independent testing shows the dynamic cache can absorb hundreds of gigabytes of writes at full speed before folding to the native TLC rate. The 8 TB model extends this further, making cache exhaustion rare under normal consumer workloads. For users who regularly ingest multi-hundred-gigabyte datasets, the sustained TLC write speed after cache exhaustion settles to roughly 1,500 MB/s, which is still fast enough for most bulk transfers.

### Does the Addlink S95 8 TB have a DRAM cache?

Yes, the Addlink S95 8 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 flash. On the 8 TB model the DRAM buffer is sized to map the full 8 TB address space without relying on host memory buffer, which keeps random access latency low and consistent even under mixed read and write loads across the entire capacity. 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.

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Last updated: 2026-07-21. Source: https://ssdrive.net/addlink-s95-8-tb