# Anacomda i4-X Fiery Serpent 4 TB: The High-Endurance E18 Flagship (2026)

The Anacomda i4-X Fiery Serpent 4 TB is the line's high-endurance flagship, pairing Phison's E18, Kioxia TLC, and a discrete DRAM cache for the full 7,000 MB/s and a verified 2,800 TBW.

Quick answer: The Anacomda i4-X Fiery Serpent 4 TB is the capacity flagship of the verified line and the model to choose when a single drive has to hold everything and absorb heavy writes for years. It delivers the full 7,000 MB/s in both directions of the E18 platform, the discrete DRAM cache that keeps sustained I/O consistent where DRAM-less drives falter, Kioxia BiCS5 TLC, and the family's highest verified 2,800 TBW endurance rating, all in a package that includes the aluminium heatsink brand-name E18 drives make buyers source separately. For a content-creation workstation, a large PS5 library, or an enthusiast build where capacity, sustained-write consistency, and write endurance all matter, the 4 TB is a strong value against the Seagate FireCuda 530, Sabrent Rocket 4 Plus, Samsung 980 Pro, and WD Black SN850X. Buyers who do not need 4 TB save with the 2 TB sweet spot or the 1 TB entry point, and the announced 8 TB extends the line for maximum capacity. The main caveat is Anacomda's thinner Western retail and review footprint compared with Samsung or WD, worth weighing against the bundled heatsink and the price advantage.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 4 TB |
| Interface | M.2 4.0 x 4 |
| Controller | Phison PS5018 E18 8 Channel |
| Memory type | Kioxia 112-L TLC |
| DRAM cache | Yes |
| Sequential read | 7000 MB/s |
| Sequential write | 7000 MB/s |
| Random read IOPS | 1000000 |
| Random write IOPS | 1000000 |
| Endurance | 2800 TBW |
| MTBF | 2000000 |
| Warranty | 5 years |

## Performance

Anacomda rates the i4-X Fiery Serpent 4 TB at the full 7,000 MB/s sequential reads and 7,000 MB/s sequential writes over PCIe 4.0 x4, the E18 platform ceiling that the 4 TB reaches by saturating the controller's eight channels with a fully populated NAND array. Random I/O is rated at roughly 1,000,000 read and write IOPS, the E18 platform's established ceiling. NiKKTech's review of the 2 TB model confirmed the platform's headline speeds and characterised the design as a very good Gen4 drive, and the same controller, firmware, and NAND carry over to the 4 TB.

The E18's discrete DDR4L-3200 DRAM cache is the performance differentiator versus the DRAM-less competition. Holding the complete flash translation layer on-drive keeps random I/O latency consistent under sustained mixed workloads, large file transfers, and DirectStorage game loading, exactly where DRAM-less HMB designs eventually slow. The 4 TB's larger SLC cache, carved from a bigger NAND pool than the smaller capacities, extends the window of peak-speed sustained writes before performance settles to native TLC throughput, which helps with large game installs, video exports, and backup restores. The trade-off versus a DRAM-less drive is higher power draw and heat, which is why Anacomda fits the aluminium heatsink. For sustained-write workloads and demanding gaming, the E18's consistency is the reason the i4-X earns its tier.

## Endurance, TBW & Warranty

Anacomda covers the i4-X Fiery Serpent line with a five-year limited warranty, terminated at whichever arrives first between the term and the drive's TBW endurance rating. The 4 TB carries a 2,800 TBW rating, per TechPowerUp's line data, the highest verified endurance in the i4-X family and competitive with other flagship Gen4 drives at this capacity. It scales from 700 TBW on the 1 TB and 1,550 TBW on the 2 TB, reflecting the Kioxia BiCS5 TLC's rated cycle life. At a typical consumer write load of 20 GB per day, the 2,800 TBW rating translates to roughly 383 years before the write budget is exhausted, so the five-year term expires long before the NAND approaches its rated limit. The headroom matters most for buyers running sustained write workloads such as 4K video editing, game capture, or running the 4 TB as a scratch and content volume, where the outsized endurance is a genuine, measurable advantage over smaller capacities. NiKKTech's review confirmed Anacomda's 1.6 million hour MTBF rating across the i4-X line, a fleet-reliability statistic describing expected failure rates across a population of drives rather than a lifespan promise for any single unit.

## Pros and Cons

**Pros:**

- Full 7,000 MB/s reads and writes, the E18 platform ceiling
- Discrete DRAM cache for consistent sustained I/O
- Kioxia 112-layer BiCS5 TLC NAND
- 2,800 TBW endurance, the family's highest verified rating
- Aluminium heatsink with graphite pad included
- Five-year warranty and 1.6 million hour MTBF
**Cons:**

- Higher power draw and heat than DRAM-less alternatives
- 4 TB carries a capacity price premium
- Heatsink requires M.2 slot clearance
- Smaller Western retail and review footprint than Samsung or WD
- Exact IOPS not published by the manufacturer


## Verdict

The Anacomda i4-X Fiery Serpent 4 TB is the capacity flagship of the verified line and the model to choose when a single drive has to hold everything and absorb heavy writes for years. It delivers the full 7,000 MB/s in both directions of the E18 platform, the discrete DRAM cache that keeps sustained I/O consistent where DRAM-less drives falter, Kioxia BiCS5 TLC, and the family's highest verified 2,800 TBW endurance rating, all in a package that includes the aluminium heatsink brand-name E18 drives make buyers source separately. For a content-creation workstation, a large PS5 library, or an enthusiast build where capacity, sustained-write consistency, and write endurance all matter, the 4 TB is a strong value against the Seagate FireCuda 530, Sabrent Rocket 4 Plus, Samsung 980 Pro, and WD Black SN850X. Buyers who do not need 4 TB save with the 2 TB sweet spot or the 1 TB entry point, and the announced 8 TB extends the line for maximum capacity. The main caveat is Anacomda's thinner Western retail and review footprint compared with Samsung or WD, worth weighing against the bundled heatsink and the price advantage.

## Frequently Asked Questions

### What is the endurance of the Anacomda i4-X 4 TB?

The 4 TB i4-X carries a 2,800 TBW endurance rating, per TechPowerUp's line data, the highest verified endurance in the i4-X family. It scales with capacity across the line, 700 TBW on the 1 TB and 1,550 TBW on the 2 TB, reflecting the Kioxia BiCS5 TLC's rated cycle life. At a typical 20 GB of writes per day the 4 TB would need roughly 383 years to exhaust its write budget, so the five-year warranty term expires long before the NAND approaches its rated limit. That headroom is most useful for buyers running sustained write workloads such as 4K video editing or game capture.

### Is the Anacomda i4-X Fiery Serpent 4 TB fast?

Yes. It reaches the full 7,000 MB/s sequential read and 7,000 MB/s sequential write ceiling of the Phison E18 platform, matching the 2 TB and well above the 1 TB's 5,000 MB/s write figure. NiKKTech reviewed the platform and called it a very good Gen4 model, confirming the headline speeds and the dynamic-range SLC cache, SmartECC, and LDPC reliability features. Random I/O is rated at roughly 1,000,000 read and write IOPS, and the discrete DRAM cache keeps that random performance consistent under sustained mixed workloads. The 4 TB's larger SLC cache also extends peak-speed sustained writes further than on the smaller capacities.

### Does the Anacomda i4-X 4 TB have a DRAM cache?

Yes, the i4-X uses a discrete on-drive DDR4L-3200 DRAM chip to hold the full flash translation layer mapping table, the key feature separating it from DRAM-less HMB drives like the Addlink S93 or AIGO SM170. NiKKTech's review of the 2 TB identified a 2 GB SK Hynix DDR4L-3200 chip, with the DRAM size scaling with capacity across the line. The on-drive DRAM keeps random I/O latency consistent under sustained writes and heavy mixed workloads, where DRAM-less designs eventually slow as the host-memory buffer comes under pressure. This is the standard flagship-Gen4 architecture shared with the Samsung 980 Pro and WD Black SN850X.

### Is the Anacomda i4-X Fiery Serpent 4 TB good for the PS5?

Yes, and the bundled heatsink makes it convenient. Sony requires an M.2 NVMe SSD recommending at least 5,500 MB/s sequential reads and fitting within 110 by 25 by 11.25 millimetres with a cooler installed. The i4-X clears the speed bar easily at 7,000 MB/s, and Anacomda ships it with an aluminium heat spreader plus graphite thermal pad, meeting the heatsink requirement out of the box. FunkyKit's review highlighted the thin heat spreader as ideal for PS5 installs. The 4 TB capacity is an excellent PS5 choice, holding a very large game library alongside the operating system, though buyers should confirm the heatsink assembly fits within Sony's dimensions.

### Should I buy the Anacomda i4-X 2 TB or 4 TB?

Both reach the full 7,000 MB/s in both directions on the same E18 platform, so peak performance is identical; only capacity and endurance differ. The 4 TB carries 2,800 TBW against the 2 TB's 1,550 TBW, roughly 1.8 times the write budget, and it holds a much larger game and media library. Choose the 4 TB when the drive must serve as a system's only storage and survive heavy sustained writes, and when the budget allows. Choose the 2 TB as the sweet spot for full speed with a solid game library and good endurance at a lower price. The 1 TB suits a pure boot drive, and an announced 8 TB extends the line for maximum capacity.

### Is the Anacomda i4-X Fiery Serpent 4 TB good for content creation?

Yes, and it is one of the stronger capacities in the line for it. Video editing, rendering, and compiling issue heavy sustained and mixed writes that stress a drive's mapping table, and the i4-X's discrete DRAM cache keeps random I/O latency consistent where DRAM-less designs eventually slow. The full 7,000 MB/s sequential writes, the dynamic-range SLC cache, and the 2,800 TBW endurance rating together handle large 4K media projects comfortably, and the 4 TB capacity holds substantial project files and assets without external scratch storage. The bundled heatsink manages the E18's higher heat output under sustained load, which is exactly when content-creation workloads push the drive hardest.

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Last updated: 2026-07-23. Source: https://ssdrive.net/anacomda-i4-x-firery-serpent-4-tb