Micron 4600 4 TB: The Gen5 Flagship Capacity (2026)

Name: Micron 4600 4 TB
Brand: Micron
SKU: micron-4600-4-tb
Rating: 4 (98 reviews)

Posted on June 30, 2026 by Raymond Chen

The Micron 4600 4 TB is the flagship capacity of Micron's PCIe 5.0 client SSD, pairing an efficient Silicon Motion SM2508 controller with Micron G9 TLC for up to 14,500 MB/s reads and 1,600 TBW.

Micron 4600 4 TB: The Gen5 Flagship Capacity

Controller & Memory

The Micron 4600 4 TB is the largest capacity in a four-strong PCIe 5.0 lineup (512 GB, 1 TB, 2 TB, 4 TB), and it is the model for buyers who need maximum room on a Gen5 platform. There is no 8 TB option, so the 4 TB is the ceiling. Inside is a Silicon Motion SM2508 Gen5 controller rather than the Phison E26 that dominates the first wave of PCIe 5.0 drives, paired with Micron's own G9 276-layer TLC NAND, dynamic SLC caching and an on-board DRAM cache for the address map. That SM2508 choice is the defining detail: independent reviewers single the 4600 out as efficient for a Gen5 drive, reaching flagship-class bandwidth without the heat and power penalty that made early E26 designs demanding to cool.

The 4 TB carries the highest endurance in the lineup at 1,600 TBW, against 1,200 TBW on the 2 TB, 600 TBW on the 1 TB and 300 TBW on the 512 GB, and the largest SLC write cache, so it holds sustained writes at full speed the longest before settling to the direct-TLC rate. It shares the same headline sequential rating as the rest of the lineup, up to 14,500 MB/s read and 12,000 MB/s write, and the same 2.1 million random read and write IOPS ceiling. For a drive holding a professional media library, a stack of virtual-machine images or simply a very large game collection alongside the operating system, the 4 TB is where capacity stops being a planning constraint.

The 4600 is an M.2 2280 module that drops into any PCIe 5.0 M.2 slot and, like every Gen5 drive, benefits from the motherboard's M.2 heatsink or shield even though its efficiency keeps it cooler than E26 peers. It is backward compatible with PCIe 4.0 boards, where it runs at roughly half its rated bandwidth. Direct rivals are the Crucial T705 and Corsair MP700 Pro on the Phison E26 platform and Samsung's 9100 Pro; the 4600's case against them is efficiency and Micron's in-house NAND, weighed against their typically longer 5-year retail warranties.

Storage Comparisons:

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4600 Performance & Benchmarks

Micron rates the 4600 at up to 14,500 MB/s sequential read and 12,000 MB/s sequential write over its PCIe 5.0 x4 interface, with up to 2.1 million random read and 2.1 million random write IOPS at 4K QD128. Those are manufacturer headline figures shared across the 4600 capacities, sitting close to the ceiling of what PCIe 5.0 can deliver in 2025; only the interface, not the silicon, is the limit at this tier.

Performance comparison

Micron 4600 4 TB vs M.2 5.0 peers

Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 5.0 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.

Corsair MP700 Pro XT 1 TB: 14,900 MB/s read, 14,200 MB/s write
Corsair MP700 Pro XT 2 TB: 14,900 MB/s read, 14,500 MB/s write
Corsair MP700 Pro XT 4 TB: 14,900 MB/s read, 14,400 MB/s write
Crucial T710 1 TB: 14,900 MB/s read, 13,800 MB/s write
Micron 4600 4 TB (this drive): 14,500 MB/s read, 12,000 MB/s write

For real-world use, that bandwidth shows up most in the workflows that actually saturate a Gen5 link: fast in-game asset streaming and DirectStorage titles, large file transfers, and OS responsiveness where random IOPS matter more than peak sequential. Reviewers consistently frame the 4600 as efficient rather than the single fastest Gen5 drive on the market, noting that it reaches flagship-class numbers without the high idle and load power draw that made early Phison E26 designs run hot and demand aggressive cooling.

The 4 TB is the strongest sustained-write citizen in the lineup. Its large SLC cache absorbs the longest contiguous writes of any 4600 capacity, such as a multi-hundred-gigabyte video render or a large image deployment, at full speed before dropping to the direct-TLC rate, and it recovers quickly once the write stops. For boot, applications and game libraries the cache is effectively never exhausted, so everyday performance is indistinguishable across capacities while the 4 TB gives the maximum headroom for heavy, sustained professional work.

Micron 4600 vs Competitors

See how the 4600 stacks up against other M.2 5.0 drives in our database:

Compare with rival drives:

Acer Predator GM9 4 TB ADATA Mars 980 Blade 4 TB Crucial T710 4 TB

Endurance, TBW & Warranty

The 4 TB Micron 4600 carries a rated endurance of 1,600 TBW (terabytes written), the highest in the lineup. Endurance scales sub-linearly at the top of the range: the 4 TB adds only 400 TBW over the 2 TB despite doubling the capacity. Micron covers the drive for 3 years, with coverage ending at whichever threshold comes first, the 3-year term or 1,600 TBW of cumulative writes. The 3-year term is shorter than the 5-year warranty common on retail Gen5 drives from Crucial or Samsung, and reflects the 4600's OEM lineage.

For almost all buyers the time limit, not the endurance limit, is what binds. At a typical 20 GB of writes per day, exhausting 1,600 TBW would take around 219 years; at a heavy 100 GB per day it is still roughly 44 years. Even sustained professional write workloads rarely approach the TBW ceiling inside the warranty term. The drive is also rated at 2,000,000 hours MTBF, a population-reliability statistic rather than a per-unit life expectancy.

Micron 4600 4 TB Specifications

Category	Value
Capacity [?]	4 TB
Interface [?]	M.2 5.0
Controller [?]	Silicon Motion SM2508
Memory type [?]	Micron 276-L TLC
DRAM [?]	Yes
Read speed (MB/s) [?]	14500
Write speed (MB/s) [?]	12000
Read IOPS [?]	2100000
Write IOPS [?]	2100000
Endurance (TBW) [?]	1600
MTBF (million hours) [?]	2000000
Warranty (years) [?]	3

Verdict: Is the 4600 Worth It in 2026?

The Micron 4600 4 TB is the capacity to buy when maximum room on a PCIe 5.0 platform is the point. It pairs the efficient Silicon Motion SM2508 controller and Micron G9 NAND with the lineup's highest endurance at 1,600 TBW and the largest SLC cache, so it delivers the headline 14,500 MB/s reads and 2.1M IOPS while absorbing sustained professional writes the longest of any 4600 capacity. For a media library, VM and image storage or a very large game collection, it removes capacity from the list of things to worry about.

Step down to the 2 TB unless you genuinely need the extra room; the 2 TB carries 1,200 TBW for a meaningfully lower price and is the capacity reviewers actually tested. Look elsewhere, at the Crucial T705 or Samsung 9100 Pro, if a long retail warranty matters more than efficiency, since the 4600's 3-year OEM term trails their 5-year coverage. For a Gen5 build where the priority is fast, cool and capacious, the 4 TB 4600 is the flagship of the lineup.

+ Pros

Up to 14,500 MB/s sequential reads on PCIe 5.0
Efficient Silicon Motion SM2508 Gen5 controller
1,600 TBW endurance, highest in the 4600 lineup
Largest SLC cache for sustained professional writes
TCG Opal 2.02 hardware encryption support
Lower power draw than Phison E26 Gen5 rivals

- Cons

3-year OEM warranty trails the 5-year retail norm
Premium price of the flagship capacity
PCIe 5.0 speed wasted on a PCIe 4.0 platform
No heatsink included, and no 8 TB option in the lineup

4 / 5 · 98 votes

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Video Review

Micron 4600 2TB M.2 SSD PCIe Gen5 NVMe specifications

Frequently Asked Questions

Yes, though it is more capacity than most gamers need. The 4600's PCIe 5.0 bandwidth (up to 14,500 MB/s read) and 2.1M random IOPS are well beyond what current games demand, so load times and asset streaming are effectively ceiling-bound and the drive is ready for DirectStorage titles as they arrive. The case for the 4 TB over the 2 TB is pure storage: it holds a very large game library alongside the operating system with room to spare, which matters if you keep dozens of large AAA titles installed. If your library fits comfortably in 2 TB, the smaller capacity delivers the same Gen5 performance for less money.

It will work, but it is a poor use of the drive. Sony requires an M.2 NVMe SSD with sequential reads above 5,500 MB/s, which the 4600 far exceeds, but the PS5's expansion slot is wired for PCIe 4.0, so a PCIe 5.0 drive runs there at roughly half its rated bandwidth. You would be paying Gen5 flagship prices for Gen4 performance. The 4600 also ships without a heatsink, which Sony's guidance effectively requires, and 4 TB is more capacity than a PS5 game library typically needs. A cheaper PCIe 4.0 drive is the more sensible console choice.

Yes. The 4600 pairs its Silicon Motion SM2508 controller with an on-board DRAM cache that holds the drive's logical-to-physical address mapping table in dedicated memory, rather than borrowing system RAM through the HMB mechanism used by DRAM-less designs. That gives more consistent random-access latency under mixed workloads, which matters when the drive is holding an operating system, applications and a large data set at once. The DRAM cache is present across all four capacities of the 4600 lineup, including the 4 TB flagship.

The 4 TB Micron 4600 is rated for 1,600 TBW (terabytes written), the highest in the lineup, above the 2 TB's 1,200 TBW. Endurance scales sub-linearly at the top of the range: the 4 TB adds only 400 TBW over the 2 TB despite doubling the capacity. Coverage ends at whichever limit comes first: 3 years or 1,600 TBW. In practice the time limit binds first for almost everyone, since at 20 GB of writes per day reaching 1,600 TBW would take about 219 years. Only truly enormous sustained write workloads would approach the endurance ceiling inside the warranty term.

It benefits from one, like any PCIe 5.0 drive, though less urgently than its Phison E26 rivals. The 4600's Silicon Motion SM2508 controller is noted by reviewers as efficient for a Gen5 design, so it runs cooler than the first wave of E26 drives that effectively demanded active cooling. Even so, Gen5 signalling frequencies generate real heat under sustained load, and the 4600 does not ship with a factory heatsink, so you should rely on your motherboard's M.2 shield or add a third-party heatsink to keep sustained-write performance from throttling. This applies to the 4 TB as much as the smaller capacities.

Both are PCIe 5.0 drives taking different routes to similar bandwidth. The Micron 4600 uses the Silicon Motion SM2508 controller with Micron's own G9 276-layer NAND and is singled out for efficiency, running cooler and drawing less power than the Phison E26 platform. The Crucial T705 uses the Phison E26 controller, is typically faster on peak benchmarks, but runs hotter and usually carries a 5-year retail warranty against the 4600's 3-year OEM term. If efficiency and a cooler-running build matter most, the 4600 wins; if peak benchmark speed and a longer warranty matter most, the T705 is the safer pick at this capacity.

Yes, and the 4 TB is the strongest 4600 capacity for that workload. Its large SLC cache holds sustained writes at full speed the longest of any capacity in the lineup before dropping to the direct-TLC rate, and its 1,600 TBW rating absorbs heavy write workloads for years. PCIe 5.0 bandwidth and 2.1M random IOPS speed up timeline scrubbing, scratch-disk writes, video renders and large media transfers, and 4 TB holds a substantial project library alongside the operating system. Pair it with adequate M.2 cooling for long renders, since even an efficient Gen5 drive warms under sustained writes.