# HP EX920 512GB — Mainstream PCIe 3.0 NVMe with DRAM Cache (2026)

The HP EX920 512GB doubles the capacity of the 256GB model with improved write speeds, using the same proven SM2262 controller and Micron 64-layer 3D TLC NAND.

Quick answer: The HP EX920 512GB is a solid mainstream PCIe 3.0 NVMe SSD with the SM2262 controller, Micron 3D TLC NAND, and a DRAM cache. It delivers near-ceiling read speeds and improved writes over the 256GB variant, backed by a 5-year warranty. The 512GB capacity is practical for most users. For comparable performance with more established SSD brand recognition, consider the Samsung 970 EVO or WD Black SN750.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Silicon Motion SM2262 |
| Memory type | Micron 64-L TLC |
| DRAM cache | Nanya DDR3 |
| Sequential read | 3200 MB/s |
| Sequential write | 1600 MB/s |
| Random read IOPS | 350000 |
| Random write IOPS | 260000 |
| Endurance | 320 TBW |
| MTBF | 2 |
| Warranty | 5 years |

## Performance

The HP EX920 512GB is rated at up to 3,200 MB/s sequential reads and 1,600 MB/s writes. At 3,200 MB/s, the drive uses roughly 91 percent of the PCIe 3.0 x4 interface ceiling of approximately 3,500 MB/s. The 1,600 MB/s write speed is a meaningful improvement over the 256GB variant's 1,200 MB/s, reflecting the additional NAND dies available for parallelism on the larger capacity.

The SM2262 controller's quad-core architecture and DDR3L DRAM cache give the EX920 a significant advantage in mixed workloads over DRAM-less alternatives like the WD Blue SN550 or Kingston NV2. The DRAM cache maintains the flash translation layer mapping table in fast memory, reducing latency on random reads and writes — the workloads that matter most for OS responsiveness, application launching, and game loading. Independent reviews from Tom's Hardware and TweakTown praised the EX920 for consistent performance across a range of workloads, with the Micron 64-layer TLC NAND providing good sustained write characteristics.

The SLC cache on a 512GB drive will be moderate — perhaps 40-80 GB depending on free space — meaning the EX920 will sustain its advertised write speeds for typical consumer workloads. Only sustained large file transfers exceeding the SLC cache would drop to direct TLC write speeds. The Micron 64-layer NAND maintains reasonable performance even after cache exhaustion, unlike QLC drives that drop to near-SATA speeds.

## 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 for the 512GB variant is not specified in the DB, but comparable drives typically carry 250-350 TBW for 512GB — the Samsung 970 EVO 512GB carries 300 TBW. At typical consumer write loads of 20-50 GB per day, a 512GB drive with ~300 TBW would last roughly 16-41 years before hitting the endurance limit.

## 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
- 5-year warranty matching mainstream competitors
- 512GB capacity practical for OS and applications
**Cons:**

- HP's SSD brand less established than Samsung or WD
- No published TBW endurance for 512GB variant
- PCIe 3.0 — outpaced by PCIe 4.0 alternatives
- No included heatsink for sustained workloads
- 1,600 MB/s writes trails flagship PCIe 3.0 drives


## Verdict

The HP EX920 512GB is a solid mainstream PCIe 3.0 NVMe SSD with the SM2262 controller, Micron 3D TLC NAND, and a DRAM cache. It delivers near-ceiling read speeds and improved writes over the 256GB variant, backed by a 5-year warranty. The 512GB capacity is practical for most users. For comparable performance with more established SSD brand recognition, consider the Samsung 970 EVO or WD Black SN750.

## Frequently Asked Questions

### Is the HP EX920 512GB good for gaming?

The HP EX920 512GB works well for gaming with fast 3,200 MB/s reads and strong random I/O from the SM2262 controller. The 512GB capacity fits the OS and several modern games. The DRAM cache provides consistent load times. For a large game library, consider the 1TB variant or a PCIe 4.0 alternative.

### Does the HP EX920 512GB have a DRAM cache?

Yes, the HP EX920 512GB includes DDR3L DRAM cache. The SM2262 controller supports dedicated DRAM, giving 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 512GB?

The TBW for the HP EX920 512GB is not explicitly published. Comparable 512GB drives typically carry 250-350 TBW — the Samsung 970 EVO 512GB carries 300 TBW. At 20-50 GB per day, ~300 TBW equates to roughly 16-41 years of usage, well beyond the 5-year warranty.

### What controller does the HP EX920 use?

The HP EX920 uses the Silicon Motion SM2262 controller, a quad-core PCIe 3.0 x4 NVMe controller paired with Micron 64-layer 3D TLC NAND. The SM2262 supports dedicated DRAM cache, hardware LDPC ECC, and NVMe 1.3 protocol.

### Does the HP EX920 need a heatsink?

The HP EX920 does not ship with a heatsink. As a mainstream PCIe 3.0 drive, it doesn't generate the heat levels of high-end PCIe 4.0 drives. For typical consumer use, passive airflow is sufficient. If your motherboard has an M.2 heatsink, the EX920 will fit under it.

### Is the HP EX920 512GB compatible with PS5?

No, the HP EX920 512GB is a PCIe 3.0 drive rated at 3,200 MB/s reads, below Sony's 5,500 MB/s requirement for PS5 storage expansion. For PS5 upgrades, look at PCIe 4.0 drives like the WD Black SN850X or Samsung 980 PRO.

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Last updated: 2026-05-17. Source: https://ssdrive.net/hp-ex920-512-gb