Kingmax PX4480 2TB Review — High-Capacity PCIe 4.0 SSD (2026)
The Kingmax PX4480 2TB is the top-capacity variant of Kingmax's first-generation PCIe 4.0 lineup, pairing the proven Phison E16 controller with 1,200 TBW endurance for buyers who need both speed and storage headroom.
Controller & Memory
The Kingmax PX4480 2TB shares the same Phison PS5016-E16 controller as its smaller siblings, but the doubled NAND die count gives it an endurance edge that makes it genuinely interesting for heavy users. With 3D TLC NAND and a DDR4 DRAM cache buffer, this is a reference-design drive — Kingmax didn't customize the PCB or firmware beyond the baseline E16 platform. That platform debuted in 2019 alongside AMD's first PCIe 4.0 Ryzen 3000 processors, and it's been validated across dozens of brands since.
The PX4480 2TB is rated at 5,000 MB/s sequential reads and 4,400 MB/s writes over PCIe 4.0 x4 lanes, speaking NVMe 1.3. The 2TB capacity sits at the top of Kingmax's three-size lineup — the series runs 500 GB, 1 TB, and 2 TB. With 1,200 TBW endurance, the 2TB model doubles the 1TB's rating, making it the most durable option in the PX4480 family. End-to-end data protection, LDPC error correction, and dynamic SLC caching are all present.
Direct competitors are other E16-based 2TB drives: the Corsair MP600 2TB (identical silicon, 5-year warranty, 800 TBW), the Seagate FireCuda 520 2TB (same controller, 5-year warranty, 1,800 TBW), and the Sabrent Rocket 4.0 2TB (E16 platform, often discounted). The PX4480's 3-year warranty is the shortest in this group. If you can find it at a meaningful discount, it's a fair deal. At parity pricing, the Seagate FireCuda 520 offers nearly double the TBW and two extra warranty years.
No heatsink variant exists, so thermal management is your responsibility. The E16 controller runs warm — it's a 12nm chip, and sustained writes will push it past 70°C without cooling. Use your motherboard's M.2 thermal shield or an aftermarket heatsink for anything beyond light desktop use.
Storage Comparisons:
PX4480 Performance & Benchmarks
The Kingmax PX4480 2TB is rated at up to 5,000 MB/s sequential reads and 4,400 MB/s sequential writes across its PCIe 4.0 x4 interface. Random 4K performance peaks at up to 750,000 IOPS for reads and 700,000 IOPS for writes. These figures match the 1TB model closely — the E16 controller scales well across capacities, and the 2TB variant benefits from a larger SLC cache pool thanks to its higher NAND die count.
Kingmax PX4480 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
- Kingmax PX4480 2 TB (this drive): 5,000 MB/s read, 4,400 MB/s write
The dynamic SLC cache on the 2TB model typically spans 80 to 200 GB depending on free space, roughly double the 1TB's cache range. Once the cache fills, direct TLC write speeds settle around 800 to 1,200 MB/s — still faster than any PCIe 3.0 drive but a noticeable drop from the 4,400 MB/s burst rating. For gamers and desktop users, the cache rarely exhausts in normal use. Content creators moving 500 GB+ project files will see the slowdown after the first few minutes, at which point the drive's native TLC speed takes over.
In practical terms, the PX4480 2TB handles OS booting, application launches, and game loading with the near-instant responsiveness expected of any DRAM-cached NVMe. The 2TB capacity holds a substantial game library — 30 to 50 modern titles depending on size — making it a sensible single-drive solution for users who don't want to manage multiple M.2 slots. The E16 controller does not support hardware decompression, so it won't fully leverage Microsoft DirectStorage's optimized pipeline the way newer Phison E18 or E26 drives do.
Kingmax PX4480 vs Competitors
See how the PX4480 stacks up against other M.2 4.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
Kingmax covers the PX4480 2TB with a 3-year limited warranty and a 1,200 TBW endurance rating. The 1,200 TBW figure is double the 1TB model's 600 TBW, reflecting the doubled NAND capacity available for wear leveling. At 40 GB of daily writes — a heavy desktop workload — the drive would take approximately 82 years to reach its TBW limit. The 3-year warranty expires before you're likely to approach the endurance ceiling, meaning time-based coverage is the relevant constraint, not TBW exhaustion. The 2 million hour MTBF is a statistical population figure, not an individual drive lifespan promise. Compared to the Seagate FireCuda 520 2TB's 1,800 TBW and 5-year warranty, or the Corsair MP600 2TB's 800 TBW and 5-year warranty, the PX4480's 3-year coverage is the shortest. Heavy users who plan to fill and refill the drive frequently may prefer a competitor with longer warranty terms.
Kingmax PX4480 2 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 2 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Phison PS5016-E16 |
| Memory type [?] | 3D Nand |
| DRAM [?] | DDR4 Cache |
| Read speed (MB/s) [?] | 5000 |
| Write speed (MB/s) [?] | 4400 |
| Read IOPS [?] | 750000 |
| Write IOPS [?] | 700000 |
| Endurance (TBW) [?] | 2683 |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 3 |
Verdict: Is the PX4480 Worth It in 2026?
The Kingmax PX4480 2TB is the most compelling variant in the PX4480 lineup, offering the same 5,000 MB/s PCIe 4.0 speeds as the smaller models but with 1,200 TBW endurance that makes it suitable for heavy workloads. It's a strong option for users who want a single 2TB drive for their OS, applications, and game library. The 3-year warranty remains the drive's Achilles' heel — the Seagate FireCuda 520 2TB and Corsair MP600 2TB offer identical E16 performance with 5-year warranties. Buy the PX4480 2TB if it's priced noticeably below those alternatives; otherwise, the extra warranty coverage on competing drives is worth paying for.
+ Pros
- 5,000 MB/s sequential reads on PCIe 4.0
- 1,200 TBW endurance — highest in PX4480 lineup
- 2TB capacity for large game and media libraries
- DDR4 DRAM cache for consistent random I/O
- Proven Phison E16 reference platform
- Cons
- 3-year warranty vs 5 years from competitors
- No heatsink option available
- E16 controller runs warm under sustained writes
- No hardware decompression for DirectStorage
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