# Crucial P1 1TB QLC NVMe SSD Review (2026)

The Crucial P1 1 TB is the capacity where QLC economics start making sense -- 2,000 MB/s reads, 1,700 MB/s writes within the SLC cache, and 200 TBW endurance for a drive that costs less per GB than TLC alternatives.

Quick answer: The Crucial P1 1 TB makes the best case for QLC NVMe: the 1,700 MB/s rated write speed and 200 TBW endurance are adequate for read-heavy consumer use, and the large SLC cache handles occasional write bursts. But the underlying QLC limitations -- slow native writes, low endurance, and a performance cliff when the cache fills -- make it a poor choice for write-heavy or professional workloads. TLC-based alternatives like the Samsung 970 EVO Plus, SK hynix Gold P31, or even the WD Blue SN550 offer better all-around performance and endurance at similar street prices.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 1 TB |
| Interface | M.2 3.0 x 4 |
| Controller | Silicon Motion SM2263 |
| Memory type | Micron 3D QLC |
| DRAM cache | DDR3 / DDR4 |
| Sequential read | 2000 MB/s |
| Sequential write | 1750 MB/s |
| Random read IOPS | 170000 |
| Random write IOPS | 240000 |
| Endurance | 200 TBW |
| MTBF | 1.5 |
| Warranty | 5 years |

## Performance

Crucial rates the 1 TB P1 for up to 2,000 MB/s sequential reads and 1,700 MB/s sequential writes over PCIe 3.0 x4, with 170,000 random read IOPS and 240,000 random write IOPS. These numbers are only achievable within the SLC write cache, which can be up to 100 GB on a fresh drive.

The P1's variable SLC cache is its defining feature. Unlike most TLC drives, the P1's cache can be very large on a mostly-empty drive. The caching strategy is designed to prevent the QLC write cliff rather than recover from it -- the P1 retains data in SLC for read acceleration and only folds to QLC when necessary. AnandTech found this approach effective for lightweight consumer workloads but inadequate for sustained writes.

When the SLC cache fills, all writes still pass through the SLC layer before being folded into QLC blocks. This means the cache itself acts as a throughput bottleneck during sustained writes, as the drive must simultaneously accept new writes and fold old data. Real-world write performance after cache exhaustion is a fraction of the rated speed.

## Endurance, TBW & Warranty

Crucial rates the 1 TB P1 for 200 TBW of write endurance under a five-year limited warranty, equating to approximately 0.1 drive writes per day. At 10 GB of daily writes, 200 TBW lasts roughly 55 years. The P1 includes partial power loss protection through its write-through SLC caching scheme. The 200 TBW is low for a 1 TB drive -- TLC alternatives like the Samsung 970 EVO Plus offer 600 TBW at the same capacity.

## Pros and Cons

**Pros:**

- 2,000 MB/s reads, 1,700 MB/s writes within SLC cache
- Large variable SLC cache (up to 100 GB)
- 1 GB DDR3 DRAM for FTL
- Single-sided M.2 2280 at 1 TB
- 200 TBW endurance
- Five-year warranty
**Cons:**

- QLC NAND with slow native writes
- Sharp performance cliff when SLC cache fills
- Only 200 TBW (0.1 DWPD)
- Superseded by TLC drives at similar prices
- Not suitable for write-heavy workloads
- 170K random read IOPS is low for PCIe 3.0


## Verdict

The Crucial P1 1 TB makes the best case for QLC NVMe: the 1,700 MB/s rated write speed and 200 TBW endurance are adequate for read-heavy consumer use, and the large SLC cache handles occasional write bursts. But the underlying QLC limitations -- slow native writes, low endurance, and a performance cliff when the cache fills -- make it a poor choice for write-heavy or professional workloads. TLC-based alternatives like the Samsung 970 EVO Plus, SK hynix Gold P31, or even the WD Blue SN550 offer better all-around performance and endurance at similar street prices.

## Frequently Asked Questions

### Is the Crucial P1 1TB good for gaming?

For read-heavy gaming, the P1 1 TB works well within its SLC cache. Game load times are adequate at 2,000 MB/s reads, and the 1 TB capacity holds a good game library. The catch is game installations: downloading and installing a 100 GB game will fill the SLC cache, and subsequent writes slow dramatically as the drive folds data into QLC blocks. For gamers who install games infrequently, the P1 is acceptable.

### What is QLC NAND and why does it matter in the Crucial P1?

QLC (quad-level cell) NAND stores four bits per memory cell, making it denser and cheaper than TLC (three bits per cell) but slower for writes and less durable. The P1 uses Micron 64-layer 3D QLC NAND, which is adequate for read-heavy consumer workloads but struggles with sustained writes. The drive compensates with a large SLC write cache, but once the cache fills, native QLC write speed is a fraction of TLC performance.

### Does the Crucial P1 1TB have a DRAM cache?

Yes. The 1 TB P1 includes 1 GB of DDR3 DRAM for the flash translation layer mapping tables. This is a full DRAM-based design, unlike the newer Crucial P2 which is DRAM-less. The DRAM cache helps maintain consistent performance in mixed workloads, but it cannot overcome the fundamental QLC write speed limitation.

### What is the TBW endurance of the Crucial P1 1TB?

The 1 TB P1 is rated for 200 TBW (terabytes written) under a five-year limited warranty, equating to 0.1 DWPD (drive writes per day). TLC alternatives at the same capacity typically offer 600 TBW or more. At 10 GB of writes per day, 200 TBW lasts approximately 55 years, but heavy game installations and updates will accumulate writes faster than this light-workload estimate suggests.

### How does the Crucial P1 compare to the Intel 660p?

Both use the same Silicon Motion SM2263 controller and Micron 64-layer QLC NAND. The P1 includes more DRAM (1 GB vs Intel's 256 MB) and slightly more overprovisioning. Performance is very similar between the two, with the P1 having marginal advantages in some benchmarks due to its larger DRAM. Both suffer from the same QLC write speed limitations.

### Is the Crucial P1 1TB good for video editing?

No. The QLC NAND and 200 TBW endurance make the P1 unsuitable for video editing. Sustained writes of large video files will quickly fill the SLC cache, after which write speeds drop sharply. The 200 TBW endurance is also insufficient for the heavy write workloads that video editing generates. A TLC NVMe drive like the Samsung 970 EVO Plus or WD Black SN750 is a much better choice.

---

Last updated: 2026-05-17. Source: https://ssdrive.net/crucial-p1-1-tb