# Micron 4600 1 TB Review: The PCIe 5.0 Sweet Spot (2026)

The Micron 4600 1 TB is the sweet-spot 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.

Quick answer: The Micron 4600 1 TB is the capacity we would point most buyers to. It pairs the efficient Silicon Motion SM2508 controller and Micron G9 NAND with 600 TBW of endurance and a larger SLC cache than the 512 GB, so it delivers the headline 14,500 MB/s reads and 2.1M IOPS in a size that actually holds an operating system, applications and a real game library without forcing constant capacity management.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 TB |
| Interface | M.2 5.0 |
| Controller | Silicon Motion SM2508 |
| Memory type | Micron 276-L TLC |
| DRAM cache | Yes |
| Sequential read | 14500 MB/s |
| Sequential write | 12000 MB/s |
| Random read IOPS | 2100000 |
| Random write IOPS | 2100000 |
| Endurance | 600 TBW |
| MTBF | 2000000 |
| Warranty | 3 years |

## Performance

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.

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 1 TB capacity is a good sustained-write citizen. Its SLC cache is larger than the 512 GB model's, so under a long contiguous write such as a video render or a large database dump it holds full speed for longer before dropping to the direct-TLC rate, and it recovers faster once the write stops. For boot, applications and typical game libraries the cache is effectively never exhausted, so everyday performance is indistinguishable from the larger capacities while costing meaningfully less than the 2 TB.

## Endurance, TBW & Warranty

The 1 TB Micron 4600 carries a rated endurance of 600 TBW (terabytes written), double the 300 TBW of the 512 GB model and half way to the 1,200 TBW of the 2 TB. Micron covers the drive for 3 years, with coverage ending at whichever threshold comes first, the 3-year term or 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 600 TBW would take around 82 years; at 50 GB per day it is roughly 33 years. Only users sustaining several hundred gigabytes of writes every single day would approach the TBW ceiling inside the warranty window, and that is not what a 1 TB client SSD is normally asked to do. The drive is also rated at 2,000,000 hours MTBF, a population-reliability statistic rather than a per-unit life expectancy.

## Pros and Cons

**Pros:**

- Up to 14,500 MB/s sequential reads on PCIe 5.0
- Efficient Silicon Motion SM2508 Gen5 controller
- 600 TBW endurance, double the 512 GB model
- Larger SLC cache holds sustained writes longer
- 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
- PCIe 5.0 speed wasted on a PCIe 4.0 platform
- No heatsink included
- OEM lineage means thinner retail support channels


## Verdict

The Micron 4600 1 TB is the capacity we would point most buyers to. It pairs the efficient Silicon Motion SM2508 controller and Micron G9 NAND with 600 TBW of endurance and a larger SLC cache than the 512 GB, so it delivers the headline 14,500 MB/s reads and 2.1M IOPS in a size that actually holds an operating system, applications and a real game library without forcing constant capacity management.

Step up to the 2 TB if you install many large games or work with big media files and want more headroom and a larger cache; the endurance scales to 1,200 TBW on that model. 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 PCIe 5.0 platform where the goal is fast, cool and roomy enough, the 4600 1 TB is the practical sweet spot of the lineup.

## Frequently Asked Questions

### Is the Micron 4600 1 TB good for gaming?

Yes, and it is the better gaming capacity than the 512 GB. 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 actually demand, so load times and asset streaming are effectively ceiling-bound and the drive is ready for DirectStorage titles as they arrive. The advantage of the 1 TB over the 512 GB is simply room: a modern game library outgrows half a terabyte quickly, while 1 TB holds an operating system plus a healthy set of installed games without constant shuffling. For buyers who install many large titles, the 2 TB is the next step up.

### Is the Micron 4600 1 TB compatible with the PS5?

It will work, but it is not an ideal PS5 upgrade and you would be paying for speed the console cannot use. Sony requires an M.2 NVMe SSD with sequential reads above 5,500 MB/s, which the 4600 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. The 4600 also ships without a heatsink, which Sony's guidance effectively requires, and a 1 TB capacity is modest for a console game library. A cheaper PCIe 4.0 drive of the same or larger size is the more sensible PS5 choice.

### Does the Micron 4600 have a DRAM cache?

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 for an operating-system drive. The DRAM cache is present across all four capacities of the 4600 lineup, including the 1 TB model reviewed here.

### What is the TBW endurance of the Micron 4600 1 TB?

The 1 TB Micron 4600 is rated for 600 TBW (terabytes written), double the 300 TBW of the 512 GB and half the 1,200 TBW of the 2 TB. Coverage ends at whichever limit comes first: 3 years or 600 TBW. In practice the time limit binds first for nearly everyone, since at 20 GB of writes per day reaching 600 TBW would take about 82 years, and even at a heavy 100 GB per day it is around 16 years. Only sustained, very write-heavy daily workloads would approach the endurance ceiling inside the warranty term.

### Does the Micron 4600 need a heatsink?

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.

### How does the Micron 4600 1 TB compare to the Crucial T705?

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.

### Should I buy the Micron 4600 1 TB or 2 TB?

For most buyers the 1 TB is the sweet spot; step up to the 2 TB if you genuinely need the room. The 1 TB carries 600 TBW and a large enough SLC cache for sustained writes to hold full speed for longer than on the 512 GB, and it fits an operating system, applications and a real game library. The 2 TB doubles endurance to 1,200 TBW, adds a larger cache and gives you headroom for a big game collection or large media files. If your library outgrows 1 TB, the 2 TB is worth the premium; if it does not, the 1 TB delivers the same Gen5 performance for less.

---

Last updated: 2026-06-30. Source: https://ssdrive.net/micron-4600-1-tb