Anacomda i4-X Fiery Serpent 1 TB: A Phison E18 Flagship With a Heatsink (2026)
The Anacomda i4-X Fiery Serpent 1 TB is a PCIe 4.0 flagship on Phison's E18, Kioxia TLC, and a discrete DRAM cache, reaching 7,000 MB/s reads with a bundled heatsink and 700 TBW.
Controller & Memory
The Anacomda i4-X Fiery Serpent 1 TB runs Phison's PS5018-E18, a tri-core NVMe 1.4 controller built around three 32-bit ARM Cortex R5 processors with a fourth-generation LDPC error-correction engine and end-to-end data protection. Anacomda pairs the E18 with Kioxia 112-layer BiCS5 3D TLC NAND and a discrete DDR4L-3200 DRAM chip that holds the full flash translation layer mapping table on-drive, the architecture that separates a genuine flagship from the DRAM-less HMB designs that dominate the budget tier. The drive ships with an aluminium heat spreader backed by a graphite thermal pad, a real differentiator against bare drives like the Addlink S93 or AIGO SM170, and a feature that makes it effectively PS5-ready out of the box.
Capacity matters on this platform because the E18 scales write speed with the number of populated NAND dies. The 1 TB reviewed here is rated at 7,000 MB/s sequential reads but only 5,000 MB/s sequential writes, while the 2 TB and 4 TB step up to the full 7,000 MB/s in both directions. Endurance scales with capacity too: 700 TBW on the 1 TB, 1,550 TBW on the 2 TB, and 2,800 TBW on the 4 TB, all backed by Anacomda's five-year warranty and a 1.6 million hour MTBF rating that NiKKTech's review confirmed applies across the line. The 1 TB is the entry point, so it trades some peak write speed and most of the endurance headroom for a lower price, while keeping the E18's strong random I/O and the included heatsink.
The i4-X line targets enthusiast gaming builds, PS5 upgrades, and content-creation workloads where the discrete DRAM cache and the E18's consistent sustained-write behaviour matter. NiKKTech praised the 2 TB model as a very good Gen4 drive, and the same platform underpins the 1 TB. Direct competitors include other E18 drives such as the Seagate FireCuda 530 and the Sabrent Rocket 4 Plus, and the broader Gen4 flagship set including the Samsung 980 Pro and WD Black SN850X. The i4-X's combination of a bundled heatsink, Kioxia TLC, and a five-year warranty at a lower price than the brand-name E18 drives is its value proposition, though Anacomda's thinner Western retail and review footprint than those rivals is the trade-off.
Storage Comparisons:
i4-X Firery Serpent Performance & Benchmarks
Anacomda rates the i4-X Fiery Serpent 1 TB at 7,000 MB/s sequential reads and 5,000 MB/s sequential writes over PCIe 4.0 x4. The lower write figure on the 1 TB is a function of capacity, the E18 controller has fewer NAND dies to interleave across at 1 TB than at 2 TB or 4 TB, and the larger capacities reach the platform's full 7,000 MB/s in both directions. Random I/O is rated at roughly 1,000,000 read and write IOPS, the E18 platform's established ceiling.
ANACOMDA i4-X Firery Serpent 1 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
- ANACOMDA i4-X Firery Serpent 1 TB (this drive): 7,000 MB/s read, 5,000 MB/s write
The E18's defining trait versus the DRAM-less competition is its on-drive DDR4L-3200 DRAM cache, which holds the complete flash translation layer mapping table and keeps random I/O latency consistent under sustained mixed workloads. NiKKTech's review of the 2 TB i4-X highlighted the controller's dynamic-range SLC cache, SmartECC RAID-style error correction, and fourth-generation LDPC, all of which carry over to the 1 TB. FunkyKit's review of the 1 TB confirmed the 7,000 MB/s sequential read figure and the SLC-plus-DRAM dual-cache design. The practical upside for real-world use is that the E18 holds its performance better than DRAM-less drives under heavy writes, large file transfers, and direct-storage game loading, precisely the workloads where a flagship Gen4 drive earns its premium. The trade-off is power draw and heat, which is why Anacomda ships the aluminium heatsink, and why the 1 TB is best paired with a motherboard M.2 slot that has clearance for it.
ANACOMDA i4-X Firery Serpent vs Competitors
See how the i4-X Firery Serpent stacks up against other M.2 4.0 x 4 drives in our database:
Compare with rival drives:
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 1 TB carries a 700 TBW rating, verified by TechPowerUp, which is typical for a 1 TB consumer TLC drive and matches the endurance the Samsung 980 Pro 1 TB and WD Black SN850 1 TB carry. At a typical consumer write load of 20 GB per day, the 700 TBW rating translates to roughly 96 years before the write budget is exhausted, so the five-year term expires long before the NAND approaches its rated limit. The 1 TB's lower endurance than the 2 TB (1,550 TBW) and 4 TB (2,800 TBW) is the main reason buyers running sustained write workloads such as video editing or game capture should consider stepping up a capacity. NiKKTech's review confirmed Anacomda's 1.6 million hour MTBF rating across the i4-X line, a fleet-reliability figure that indicates the expected failure rate across a large population of drives rather than a lifespan promise for any individual unit. Warranty claims route through the retailer or distributor, and Anacomda's European market presence means RMA support is generally more accessible there than for the Asia-focused AIGO SM170.
ANACOMDA i4-X Firery Serpent 1 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 1 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5018 E18 8 Channel |
| Memory type [?] | Kioxia 112-L TLC |
| DRAM [?] | Yes |
| Read speed (MB/s) [?] | 7000 |
| Write speed (MB/s) [?] | 5000 |
| Read IOPS [?] | 1000000 |
| Write IOPS [?] | 1000000 |
| Endurance (TBW) [?] | 700 |
| MTBF (million hours) [?] | 2000000 |
| Warranty (years) [?] | 5 |
Verdict: Is the i4-X Firery Serpent Worth It in 2026?
The Anacomda i4-X Fiery Serpent 1 TB is a genuine PCIe 4.0 flagship that delivers the E18 platform's strengths, a discrete DRAM cache, Kioxia BiCS5 TLC, consistent sustained-write behaviour, and roughly 1,000,000 random IOPS, in a package that includes the aluminium heatsink most rivals make buyers source separately. The 1 TB is the entry point of the line, so buyers accept 5,000 MB/s writes instead of the 7,000 MB/s the 2 TB and 4 TB reach, along with the 700 TBW endurance rating, in exchange for a lower price. For a gaming boot drive, a PS5 upgrade, or a system where the bundled heatsink and the E18's real-world consistency matter more than peak capacity, the 1 TB is a strong value against brand-name E18 drives like the Seagate FireCuda 530 or the Sabrent Rocket 4 Plus, which carry the same controller but cost more and ship bare. Buyers who need the full 7,000 MB/s write speed or substantially more write endurance should step up to the 2 TB or 4 TB i4-X, and buyers who want maximum capacity can consider the announced 8 TB flagship, though its retail availability is limited.
+ Pros
- Phison E18 flagship controller with discrete DRAM cache
- Kioxia 112-layer BiCS5 TLC NAND
- Aluminium heatsink with graphite pad included
- 7,000 MB/s sequential reads, full E18 platform read ceiling
- Five-year warranty and 1.6 million hour MTBF
- Cons
- 1 TB writes at 5,000 MB/s, below the 7,000 MB/s of larger capacities
- 700 TBW is modest; heavier writers should step up capacity
- Smaller Western retail and review footprint than brand-name E18 drives
- Heatsink requires M.2 slot clearance
- Exact IOPS not published by the manufacturer
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