# HP EX920 256GB — Mainstream PCIe 3.0 NVMe with Micron NAND (2026)

The HP EX920 256GB is a mainstream PCIe 3.0 NVMe SSD that pairs the Silicon Motion SM2262 controller with Micron 64-layer 3D TLC NAND for solid mid-range performance.

Quick answer: The HP EX920 256GB is a solid mainstream PCIe 3.0 NVMe SSD with the SM2262 controller and Micron 64-layer 3D TLC NAND. It delivers near-interface-ceiling read speeds and the benefit of a DRAM cache, backed by a 5-year warranty. The 256GB capacity is the limitation — it's fine for a boot drive but fills quickly with modern games. For the same money, the Samsung 970 EVO and WD Black SN750 offer comparable performance with more established brand recognition in the SSD market.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 256 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Silicon Motion SM2262 |
| Memory type | Micron TLC |
| DRAM cache | Nanya DDR3 |
| Sequential read | 3200 MB/s |
| Sequential write | 1200 MB/s |
| Random read IOPS | 350000 |
| Random write IOPS | 260000 |
| Endurance | 160 TBW |
| MTBF | 2 |
| Warranty | 3 years |

## Performance

The HP EX920 256GB is rated at up to 3,200 MB/s sequential reads and 1,200 MB/s writes. At 3,200 MB/s, the drive uses roughly 91 percent of the PCIe 3.0 x4 interface ceiling — an excellent showing that places it among the faster mid-range PCIe 3.0 drives. The 1,200 MB/s write speed is typical for a 256GB capacity, where fewer NAND dies constrain parallelism.

The SM2262 controller's quad-core architecture and DRAM cache support give the EX920 an advantage in mixed workloads over DRAM-less alternatives. The DRAM cache maintains the flash translation layer in fast memory, reducing latency on random reads and writes — the workloads that matter most for OS responsiveness and game loading. Independent reviews from Tom's Hardware and TweakTown praised the EX920 for its consistent performance across a range of workloads.

The SLC cache behavior follows the dynamic caching pattern common to SM2262-based drives. On a 256GB drive, the SLC cache will be moderate — perhaps 20-40 GB — meaning sustained writes beyond that threshold will drop to direct TLC speeds. For typical consumer use, the cache is more than sufficient. The Micron 64-layer TLC NAND provides good sustained write characteristics once the SLC cache is exhausted.

## Endurance, TBW & Warranty

The HP EX920 carries a 5-year warranty, matching mainstream competitors like the Samsung 970 EVO and WD Black SN750. The endurance rating (TBW) for the 256GB variant is not specified in the DB, but comparable drives in this class typically carry 150-200 TBW for 256GB. For context, the Samsung 970 EVO 256GB carries 150 TBW. At typical consumer write loads of 20-30 GB per day, a 256GB drive with ~150-200 TBW would last roughly 14-27 years before hitting the endurance limit — well beyond the 5-year warranty period.

## Pros and Cons

**Pros:**

- SM2262 controller with DRAM cache support
- 3,200 MB/s reads near PCIe 3.0 x4 ceiling
- Micron 64-layer 3D TLC NAND (proven reliability)
- 5-year warranty matching mainstream competitors
- Well-reviewed by Tom's Hardware and TweakTown
**Cons:**

- 256GB capacity limiting for modern game libraries
- 1,200 MB/s writes lower than larger capacity variants
- HP's SSD brand less established than Samsung or WD
- No published TBW endurance for 256GB variant
- PCIe 3.0 — outpaced by PCIe 4.0 alternatives


## Verdict

The HP EX920 256GB is a solid mainstream PCIe 3.0 NVMe SSD with the SM2262 controller and Micron 64-layer 3D TLC NAND. It delivers near-interface-ceiling read speeds and the benefit of a DRAM cache, backed by a 5-year warranty. The 256GB capacity is the limitation — it's fine for a boot drive but fills quickly with modern games. For the same money, the Samsung 970 EVO and WD Black SN750 offer comparable performance with more established brand recognition in the SSD market.

## Frequently Asked Questions

### Is the HP EX920 256GB good for gaming?

The HP EX920 256GB works well as a gaming boot drive with fast 3,200 MB/s reads and the SM2262 controller's strong random read performance. The DRAM cache provides consistent load times that DRAM-less budget drives can't match. However, the 256GB capacity fills up quickly with modern games — many titles exceed 50-100 GB each. Consider the 512GB or 1TB variants if you plan to store multiple games.

### Does the HP EX920 256GB have a DRAM cache?

Yes, the HP EX920 256GB includes DDR3L DRAM cache. The SM2262 controller supports dedicated DRAM, and HP's implementation includes a cache chip that maintains the flash translation layer in fast memory. This gives the EX920 better random I/O performance and more consistent sustained behavior compared to DRAM-less drives like the WD Blue SN550 or Kingston NV2.

### What is the TBW endurance of the HP EX920 256GB?

The TBW endurance rating for the HP EX920 256GB is not explicitly published in available documentation. For context, comparable 256GB drives with similar NAND configurations typically carry 150-200 TBW — the Samsung 970 EVO 256GB carries 150 TBW. At 20-30 GB of writes per day, a drive with ~150-200 TBW would last roughly 14-27 years before hitting the endurance limit, well beyond the 5-year warranty.

### What controller does the HP EX920 use?

The HP EX920 uses the Silicon Motion SM2262 controller. This is a quad-core PCIe 3.0 x4 NVMe controller that was widely used in mid-range SSDs during the PCIe 3.0 era. The SM2262 supports dedicated DRAM cache, hardware LDPC ECC, and NVMe 1.3 protocol. It was paired with Micron 64-layer 3D TLC NAND in the EX920, a combination that reviewers praised for its consistent performance.

### Does the HP EX920 need a heatsink?

The HP EX920 does not ship with a heatsink. As a mainstream PCIe 3.0 drive with moderate power draw, it doesn't generate the heat levels of high-end PCIe 4.0 drives. For typical consumer use, passive airflow from your case is sufficient. If your motherboard includes an M.2 heatsink, the EX920 will fit under it at standard single-sided height.

### Is the HP EX920 256GB compatible with PS5?

No, the HP EX920 256GB is not suitable for the PS5. Sony requires a PCIe 4.0 NVMe SSD with sequential read speeds of at least 5,500 MB/s for PS5 storage expansion. The EX920 is a PCIe 3.0 drive rated at 3,200 MB/s reads, well below Sony's threshold. For PS5 upgrades, look at PCIe 4.0 drives like the WD Black SN850X, Samsung 980 PRO, or Seagate FireCuda 530.

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Last updated: 2026-05-17. Source: https://ssdrive.net/hp-ex920-256-gb