HP EX950 512GB NVMe SSD Review — PCIe 3.0 (2026)
The HP EX950 512GB is a PCIe 3.0 NVMe SSD built on the Silicon Motion SM2262EN controller and Micron 64-layer TLC NAND, offering 3,500 MB/s reads and 320 TBW endurance in a proven mid-range platform.
Controller & Memory
The EX950 is produced by BIWIN Storage under HP's brand authorization. Under the label sits a rebranded Silicon Motion SM2262ENG controller paired with Micron 64-layer 3D TLC NAND and a Nanya or Micron DDR3 DRAM cache. The SM2262EN is one of the better PCIe 3.0 controllers, known for strong random IO and consistent sustained writes.
The 512GB model is rated at 3,500 MB/s sequential reads and 2,900 MB/s sequential writes, with 410K random read IOPS and 380K random write IOPS. Endurance is 320 TBW. The EX950 range also includes 256GB, 1TB, and 2TB capacities with the same peak read/write speeds but scaling endurance — 160 TBW, 650 TBW, and 1,300 TBW respectively.
HP's firmware went through a notable revision: early EX950 units shipped with firmware that underperformed in some benchmarks, and HP later issued an update (42A7T36A) that significantly improved real-world performance. Buyers should verify their firmware version using HP's support tools. The drive competes with the Samsung 970 EVO Plus 500GB, the ADATA SX8200 Pro 512GB, and the WD Black SN750 500GB.
Storage Comparisons:
EX950 Performance & Benchmarks
The HP EX950 512GB is rated for 3,500 MB/s sequential reads and 2,900 MB/s sequential writes. With the updated firmware, independent reviewers found the EX950 competitive with — and in some real-life tests faster than — the Samsung 970 Pro, which is high praise for a drive at this price point. The SM2262EN controller's strength is sustained random IO, where it holds consistent performance even as the drive fills.
HP EX950 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.
- HP EX950 512 GB (this drive): 3,500 MB/s read, 2,900 MB/s write
- 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
The 512GB model has fewer NAND die than the 1TB and 2TB variants, so sustained write throughput after SLC cache exhaustion is lower — roughly 1,200–1,500 MB/s versus 1,800–2,200 MB/s on the larger models. The SLC cache on the 512GB model absorbs roughly 30–50 GB of burst writes at full speed before folding to TLC. For a boot and application drive that handles mostly reads, the cache behavior is rarely a factor. Gaming load times are fast and consistent.
HP EX950 vs Competitors
See how the EX950 stacks up against other M.2 3.0 x 4 drives in our database:
Compare with rival drives:
Endurance, TBW & Warranty
HP rates the EX950 512GB at 320 TBW with a five-year limited warranty. At a typical consumer workload of 20–30 GB per day, the endurance budget covers 29 to 43 years. The drive carries a 2 million hour MTBF rating, a population-level reliability estimate. HP provides SSD management tools for health monitoring and firmware updates — important given the early firmware performance issues that were later resolved. Warranty service is handled through HP's RMA process.
HP EX950 512 GB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 512 GB |
| Interface [?] | M.2 3.0 x 4 |
| Controller [?] | Silicon Motion SM2262EN |
| Memory type [?] | Micron 64L 3D TLC |
| DRAM [?] | Nanya or Micron 512 - 2TB DDR3 |
| Read speed (MB/s) [?] | 3500 |
| Write speed (MB/s) [?] | 2900 |
| Read IOPS [?] | 410000 |
| Write IOPS [?] | 380000 |
| Endurance (TBW) [?] | 320 |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 5 |
Verdict: Is the EX950 Worth It in 2026?
The HP EX950 512GB is a well-built PCIe 3.0 NVMe SSD that delivers strong 3,500 MB/s reads and competitive real-world performance, especially with the updated firmware. The SM2262EN controller and Micron TLC NAND are a proven combination, and the 320 TBW endurance provides comfortable headroom for a boot drive. The main caveat is the early firmware issue — buyers should verify and update firmware if needed. For the price, the EX950 512GB competes effectively with the Samsung 970 EVO Plus and WD Black SN750. Those who need more capacity and endurance should consider the EX950 1TB, which offers doubled storage and 650 TBW for a modest price increase.
+ Pros
- 3,500 MB/s reads and 2,900 MB/s writes on PCIe 3.0
- SM2262EN controller with strong random IO performance
- Micron 64-layer TLC NAND — consistent sustained writes
- 320 TBW endurance with 5-year warranty
- DDR3 DRAM cache for reliable FTL management
- Cons
- Early firmware had performance issues — verify update
- 512GB may be tight for combined OS and game library
- HP-branded but manufactured by BIWIN — limited brand heritage in SSDs
- Double-sided PCB may limit slim-laptop compatibility
- PCIe 3.0 — surpassed by Gen4 drives
Buy this or similar SSD Storage:
Video Review
HP EX 950 SSD M.2 NVME | The FASTEST SSD i have Used 😝 3500 MB/S
