HP EX920 512GB — Mainstream PCIe 3.0 NVMe with DRAM Cache
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.
The HP EX920 512GB pairs the Silicon Motion SM2262 controller with Micron 64-layer 3D TLC NAND and DDR3L DRAM cache. The SM2262 is a quad-core PCIe 3.0 x4 controller that was one of the most capable mid-range designs of the PCIe 3.0 era, and the Micron NAND is sourced directly from a top-tier manufacturer.
The 512GB variant is rated at 3,200 MB/s sequential reads and 1,600 MB/s writes — the same read speed as the 256GB but with 33 percent higher writes thanks to additional NAND parallelism. The DRAM cache gives the EX920 better random I/O performance than DRAM-less budget drives.
The EX920 was HP's mainstream NVMe offering, positioned against the Samsung 970 EVO, WD Black SN750, and ADATA SX8200 Pro. It carries a 5-year warranty. The 512GB capacity makes it practical as a primary drive for the OS, applications, and a moderate game library.
The EX920 was well-reviewed by tech publications for its combination of Micron NAND quality, competitive pricing, and consistent performance across workloads. While HP is better known for PCs and printers than SSDs, the EX920 was a credible entry into the consumer storage market.
✅ Storage Comparisons:
🚀 Performance and benchmarks
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.
HP EX920 512 GB vs M.2 3.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 3.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- ADATA SX 8800 Pro 512 GB: 3,500 MB/s read, 2,700 MB/s write
- ADATA SX 8800 Pro 1 TB: 3,500 MB/s read, 2,700 MB/s write
- ADATA XPG Spectrix S40G RGB 256 GB: 3,500 MB/s read, 3,000 MB/s write
- ADATA XPG Spectrix S40G RGB 512 GB: 3,500 MB/s read, 3,000 MB/s write
- HP EX920 512 GB (this drive): 3,200 MB/s read, 1,600 MB/s write
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 and 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.
📊 Specs
| Category | Value |
|---|---|
| Capacity [?] | 512 GB |
| Interface [?] | M.2 3.0 x 4 |
| Controller [?] | Silicon Motion SM2262 |
| Memory type [?] | Micron 64-L TLC |
| DRAM [?] | Nanya DDR3 |
| Read speed (MB/s) [?] | 3200 |
| Write speed (MB/s) [?] | 1600 |
| Read IOPS [?] | 350000 |
| Write IOPS [?] | 260000 |
| Endurance (TBW) [?] | 320 |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 5 |
Conclusion
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.
+ 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
🛒 Buy this or similar SSD Storage:
✨ Video Review
HP EX920 M.2 NVME in Lian Li PC-011 Dynamic - Install & Review
