Kioxia Exceria Pro G2 4 TB

● HIGHLY RATED
Site Score
4.5 / 5.0
Buyer Guidance: An exceptional PCIe 5.0 NVMe SSD offering flagship read and write throughput and manageable thermals for enthusiasts and heavy production workloads.
Mizex Audit Breakdown
Engineering & Core Performance (30%) 4.7 / 5.0
Build Quality & Physical Design (20%) 4.5 / 5.0
Thermal, Power & Acoustics (20%) 4.4 / 5.0
Reliability & Stability (20%) 4.6 / 5.0
Buyer Value (10%) 4.3 / 5.0
Score Rationale
The composite score of 4.5 reflects exceptional Engineering & Architecture (4.7) driven by the Silicon Motion SM2508 controller, 218-layer BiCS8 3D TLC NAND, and 4 GB of dedicated LPDDR4X cache. Build quality (4.5) is validated by clean M.2 2280 physical construction and standard mounting tolerances. Thermal management (4.4) is a notable highlight, operating silently and avoiding the cumbersome active fan cooling required by earlier PCIe 5.0 drives. Reliability (4.6) is reinforced by a strong 2,400 TBW rating and a 5-year warranty, while Buyer value (4.3) remains strong for bleeding-edge Gen 5 performance despite sustained write speeds tapering to approximately 2,852 MB/s outside the SLC cache.
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Overview

The Kioxia Exceria Pro G2 4 TB represents a refined leap in next-generation solid-state storage, integrating Silicon Motion’s SM2508 controller with Kioxia’s proprietary 218-layer BiCS8 3D TLC NAND flash. Operating across a PCIe 5.0 x4 interface over the NVMe 2.0d protocol and supported by 4 GB of high-speed LPDDR4X DRAM cache, the drive reaches blistering peak throughput speeds up to 14,900 MB/s sequential read and 13,700 MB/s sequential write, backed by random read and write I/O rates reaching 2,300,000 IOPS and 1,950,000 IOPS respectively.

Built on a standard M.2 2280 form factor, the drive exhibits tight component assembly and clean trace routing, ensuring broad compatibility with standard motherboard thermal armor and expansion slots. A notable architectural advancement over first-generation PCIe 5.0 drives is its power efficiency, allowing it to sustain heavy computational tasks under standard chassis airflow and motherboard heat spreaders without demanding noisy dedicated heatsink fans.

In practical workstation and gaming environments, the Exceria Pro G2 exhibits rock-solid stability and high longevity, backed by an endurance rating of 2,400 TBW and a comprehensive 5-year warranty. While sustained sequential writing experiences a throughput drop to roughly 2,852 MB/s once the dynamic SLC cache is exhausted, the drive maintains steady native TLC recovery and fluid responsiveness throughout intense sustained workloads.

Technical Specifications

Capacity 4 TB
Form Factor M.2 2280
Interface PCIe 5.0 x4
Protocol NVMe 2.0d
Controller Silicon Motion SM2508
Nand Flash Type Kioxia 218-layer BiCS8 3D TLC
Dram Cache 4 GB LPDDR4X
Max Sequential Read 14,900 MB/s
Max Sequential Write 13,700 MB/s
Max Random Read Iops 2,300,000 IOPS
Max Random Write Iops 1,950,000 IOPS
Endurance Tbw 2,400 TBW
Post Cache Sustained Write Speed ~2,852 MB/s
Warranty Years 5 years
✔ Pros
  • Blistering sequential speeds up to 14,900 MB/s read and 13,700 MB/s write over PCIe 5.0 x4
  • Class-leading random I/O performance reaching up to 2,300,000 read IOPS
  • Dense 218-layer BiCS8 3D TLC NAND delivering high endurance rated at 2,400 TBW
  • Efficient thermal profile operable with standard passive motherboard heatsinks without requiring active fans
✖ Cons
  • Sustained sequential write throughput throttles down to ~2,852 MB/s after SLC cache exhaustion
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Primary Sources & Audited Citations

Where To Buy

Official Store (Kioxia)
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