# Micron 3400 512GB SSD — In-Depth Review & Specs (2026)

The Micron 3400 is an OEM-focused M.2 NVMe SSD built on PCIe 4.0 and Micron's own 176-layer TLC NAND. It is not sold at retail — you will typically find it inside Dell, HP, Lenovo, and other brand-name laptops and pre-built desktops. The 512GB variant delivers up to 6,600 MB/s sequential reads and 3,600 MB/s writes, making it a competent mid-range Gen4 drive for everyday computing, creative work, and gaming.

Quick answer: The Micron 3400 512GB is a competent, power-efficient PCIe 4.0 NVMe SSD that punches above its weight class for an OEM DRAM-less drive. The 176-layer TLC NAND and Micron's in-house controller deliver solid Gen4 sequential throughput and more than enough random I/O for a responsive Windows or Linux daily driver. It is not a performance leader, and the 512GB capacity limits both write speed and usable space, but for the right price — particularly as a pulled OEM unit — it offers a meaningful upgrade over any SATA or PCIe 3.0 drive. If you need retail packaging and a direct warranty, look at the Crucial P5 Plus or T500 instead.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 GB |
| Interface | M.2 4.0 x 4 |
| Controller | Micron |
| Memory type | Micron 3D TLC |
| DRAM cache | No (HMB) |
| Sequential read | 6600 MB/s |
| Sequential write | 3600 MB/s |
| Random read IOPS | 360000 |
| Random write IOPS | 700000 |
| Endurance | 300 TBW |
| MTBF | 2 |
| Warranty | 3 years |

## Performance

The 3400's real-world PCMark 10 storage scores land in the mid-range of PCIe 4.0 drives — faster than any Gen3 drive but a step behind DRAM-equipped Gen4 flagships in latency-sensitive tasks. Sequential reads hit the advertised 6,600 MB/s mark consistently. Sequential writes at 3,600 MB/s are ample for everyday file copies but will feel constrained if you regularly move large video projects. The DRAM-less HMB design means the drive leans on system memory for its mapping tables; on modern platforms (Windows 10/11, recent Linux kernels) this works transparently. On older systems without robust HMB support, random I/O can suffer slightly. Temperature under load typically settles between 60–70°C without a heatsink, which is warm but within spec for a DRAM-less Gen4 drive.

## Endurance, TBW & Warranty

As an OEM product, the Micron 3400 carries no direct end-user warranty. The drive is warrantied through the system manufacturer (Dell, HP, Lenovo, etc.) as part of the original device. If purchased separately through resellers or pulled from a decommissioned machine, you should assume no warranty coverage. Always confirm return policies with the seller before buying an OEM drive on the secondary market.

## Pros and Cons

**Pros:**

- Strong 6,600 MB/s sequential reads
- Excellent idle power efficiency with 176L TLC
- Compact M.2 2280 single-sided form factor
- AES 256-bit hardware encryption
- Runs cool enough for most laptop installations
**Cons:**

- 512GB write speed (3,600 MB/s) trails larger capacities
- DRAM-less HMB design limits peak random performance
- No direct end-user warranty (OEM product only)
- Not sold at retail — availability depends on pulls or system resellers
- Small capacity for a primary game or media library


## Verdict

The Micron 3400 512GB is a competent, power-efficient PCIe 4.0 NVMe SSD that punches above its weight class for an OEM DRAM-less drive. The 176-layer TLC NAND and Micron's in-house controller deliver solid Gen4 sequential throughput and more than enough random I/O for a responsive Windows or Linux daily driver. It is not a performance leader, and the 512GB capacity limits both write speed and usable space, but for the right price — particularly as a pulled OEM unit — it offers a meaningful upgrade over any SATA or PCIe 3.0 drive. If you need retail packaging and a direct warranty, look at the Crucial P5 Plus or T500 instead.

## Frequently Asked Questions

### Is the Micron 3400 good for gaming?

Yes — for a boot drive. Game load times benefit from the fast random reads, but the 512GB capacity fills up quickly with modern titles. It works best as an OS drive paired with a larger secondary SSD for your game library.

### Does the Micron 3400 have DRAM cache?

No. The Micron 3400 uses the NVMe Host Memory Buffer (HMB) protocol, which borrows a small portion of system RAM (usually 32–64 MB) to cache the mapping table. Real-world performance is close to a DRAM-equipped drive for most consumer workloads.

### What is the warranty on the Micron 3400?

As an OEM drive, the Micron 3400 carries no direct end-user warranty. Warranty coverage comes through the system manufacturer (e.g., Dell or Lenovo) that shipped the drive in a new computer. Drives bought separately on the secondary market should be treated as warranty-free.

### Can I use the Micron 3400 in a PS5?

The PS5 requires a minimum of 5,500 MB/s sequential read speed, and the Micron 3400 meets this at 6,600 MB/s. However, the 512GB capacity is below Sony's 250GB lower limit so it would technically work, but the capacity is far too small for a practical PS5 game library. A 1TB or larger drive is strongly recommended for console use.

### How does the Micron 3400 compare to the Crucial P5 Plus?

The Crucial P5 Plus is the retail equivalent from Micron's consumer brand. It uses the same 176L TLC NAND but a different controller (Micron DM02A1 with slightly different firmware tuning) and includes DRAM on the 1TB and 2TB models. The P5 Plus is easier to find at retail and comes with a 5-year warranty, making it the safer choice for end users building their own PC.

---

Last updated: 2026-05-17. Source: https://ssdrive.net/micron-3400-512-gb