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Micron 4600 4TB specifications and in-depth review

Micron 4600 4TB

Manufacturer: Micron

The Micron 4600 4TB is an M.2 form factor SSD built around the NVMe 2.0 protocol and a PCIe 5.0 interface, positioning it among the more recent generations of consumer and prosumer storage solutions. It carries a 4TB capacity backed by TLC NAND storage and a DRAM cache, which generally helps sustain consistent performance during varied workloads. The drive ships without an integrated heatsink, so thermal management depends on the platform or enclosure it is installed in.

On the performance side, the Micron 4600 4TB is rated for sequential read speeds of 14,500 MB/s and sequential write speeds of 12,000 MB/s, with random read and write figures both reaching 2,100,000 IOPS. The Silicon Motion SM2508 controller manages data flow across 8 channels, contributing to those throughput figures. Endurance is rated at 1,600 TBW, and Micron specifies a mean time between failures of 2 million hours alongside a 5-year warranty. The drive also supports 256-bit AES encryption and does not include RGB lighting.

Pros
  • Sequential read and write speeds of 14,500 MB/s and 12,000 MB/s respectively place it firmly in the PCIe 5.0 performance tier
  • Random read and write performance both rated at 2,100,000 IOPS, supporting demanding workloads with many simultaneous operations
  • A 1,600 TBW endurance rating provides substantial write longevity for a 4TB drive
  • DRAM cache helps maintain consistent performance during sustained or mixed workloads
  • 256-bit AES encryption support adds a layer of data security without requiring additional hardware
  • A 5-year warranty and a 2 million hour MTBF rating reflect strong reliability expectations from the manufacturer
Cons
  • No integrated heatsink included, meaning thermal management relies entirely on the host system or enclosure
  • TLC NAND, while common at this capacity, can experience write performance variability under sustained heavy write loads compared to SLC or MLC alternatives
  • The 8-channel controller configuration may become a limiting factor when the interface's full bandwidth is consistently pushed
  • M.2 form factor limits installation to systems with a compatible slot, excluding older or non-standard platforms
Who is this for?

This drive is well suited to users who need high-throughput storage for demanding workloads such as large file transfers, video editing with heavy assets, or data-intensive professional tasks. The PCIe 5.0 interface combined with NVMe 2.0 and 2,100,000 IOPS random performance makes it a strong fit for environments where storage is frequently under sustained load, such as content creation workstations or local data processing setups. The 4TB capacity paired with a 1,600 TBW endurance rating also makes it practical for users who write large volumes of data regularly and need a drive that can hold up over time, while the 256-bit AES encryption support adds relevance for those handling sensitive files.

Who is this NOT for?

Users building compact or passively cooled systems may find this drive problematic, as it ships without an integrated heatsink and PCIe 5.0 drives at this performance level tend to generate significant heat that must be managed by the platform itself. It is also not a practical fit for systems that lack a PCIe 5.0 M.2 slot, since the drive's performance tier is tied directly to that interface generation. Additionally, users with light, everyday storage needs — such as basic document management, web browsing, or casual use — would find little practical benefit from the drive's high-end specifications, as those workloads cannot meaningfully exercise its throughput or IOPS capabilities.

Read speed:

sequential read speed 14500 MB/s
random read speed 2100000 IOPS

The Micron 4600 4TB reaches a sequential read speed of 14,500 MB/s, reflecting the throughput capacity available for large, contiguous data transfers. For workloads involving smaller, non-sequential operations, the drive is rated at 2,100,000 IOPS for random reads, indicating its ability to handle a high volume of simultaneous read requests across scattered data locations.

Write speed:

sequential write speed 12000 MB/s
random write speed 2100000 IOPS

The Micron 4600 4TB supports a sequential write speed of 12,000 MB/s, covering sustained write performance across large blocks of data. On the random side, the drive is rated at 2,100,000 IOPS for write operations, reflecting its capacity to process a high number of small, dispersed write requests concurrently.

Benchmarks:

General info:

type M2
SSD cache DRAM cache
Is an NVMe SSD ✓
NVMe version 2
internal storage 4000GB
controller Silicon Motion SM2508
SSD storage type TLC
PCI Express (PCIe) version 5
Controller channels 8
Terabytes Written (TBW) 1600
MTBF 2million hours
warranty period 5 years
Has an integrated heatsink ✕
bits of encryption supported 256
has RGB lighting ✕

The Micron 4600 4TB is an M.2 form factor drive using TLC NAND storage and a DRAM cache, with a total internal capacity of 4,000GB. It operates as an NVMe SSD under NVMe version 2 over a PCIe 5.0 interface, and is managed by a Silicon Motion SM2508 controller running 8 channels. Endurance is rated at 1,600 TBW with an MTBF of 2 million hours, and the drive is backed by a 5-year warranty. It supports 256-bit AES encryption but does not include an integrated heatsink or RGB lighting.

Final Verdict

The Micron 4600 4TB is a high-specification M.2 NVMe SSD that clearly targets users with serious storage demands, offering a compelling combination of capacity and throughput within the PCIe 5.0 generation. Its 14,500 MB/s sequential read speed and 2,100,000 IOPS random performance make it a capable drive for sustained, workload-heavy environments, while the 1,600 TBW endurance rating and 5-year warranty reinforce its suitability for long-term, intensive use. That said, the absence of an integrated heatsink and its dependency on a PCIe 5.0-compatible platform mean it fits best in systems that are already equipped to support it. For users whose workloads can genuinely leverage what this drive offers, the Micron 4600 4TB represents a well-specified option within the current high-performance SSD landscape.