# 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.

Quick answer: 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.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 512 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Silicon Motion SM2262EN |
| Memory type | Micron 64L 3D TLC |
| DRAM cache | Nanya or Micron 512 - 2TB DDR3 |
| Sequential read | 3500 MB/s |
| Sequential write | 2900 MB/s |
| Random read IOPS | 410000 |
| Random write IOPS | 380000 |
| Endurance | 320 TBW |
| MTBF | 2 |
| Warranty | 5 years |

## Performance

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.

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.

## 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.

## Pros and Cons

**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


## Verdict

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.

## Frequently Asked Questions

### Is the HP EX950 512GB good for gaming?

The EX950 512GB delivers 3,500 MB/s reads and 410K random read IOPS, providing fast and consistent game load times. The 512GB capacity holds the OS plus 6–10 AAA games. The SM2262EN controller maintains performance even as the drive fills, which is important for a gaming drive that frequently receives large game updates. With the updated firmware, the EX950 is competitive with the Samsung 970 EVO Plus in gaming workloads.

### Does the HP EX950 have a DRAM cache?

Yes. The EX950 uses DDR3 DRAM (Nanya or Micron) to support the Silicon Motion SM2262EN controller's flash translation layer. The DRAM size varies by capacity — the 512GB model has a proportionally smaller DRAM chip than the 1TB and 2TB variants. DRAM cache improves random write consistency and sustained performance under mixed workloads.

### What is the TBW endurance of the HP EX950 512GB?

The HP EX950 512GB is rated at 320 TBW (terabytes written), covered by a five-year limited warranty. At a typical consumer workload of 20–30 GB per day, the endurance budget covers 29 to 43 years. For a boot and game drive that handles mostly reads, endurance is well within comfortable limits for the warranty period.

### Should I update the HP EX950 firmware?

If the drive is running early firmware (version SS0411B), updating to the revised firmware (42A7T36A) is recommended. TechPowerUp's testing showed the firmware update resolved performance issues in some benchmarks and improved real-world write consistency. Use HP's SSD management tool or check the HP support website for the latest firmware version and update instructions.

### How does the HP EX950 compare to the Samsung 970 EVO Plus?

Both are PCIe 3.0 NVMe drives with TLC NAND and DRAM cache. The Samsung 970 EVO Plus uses Samsung's in-house Phoenix controller and Samsung TLC, while the EX950 uses the Silicon Motion SM2262EN with Micron TLC. Peak speeds are similar at 3,500 MB/s reads. The Samsung has broader brand recognition and a more established firmware track record. The EX950 is typically priced lower. Both deliver strong real-world performance — the choice often comes down to price and availability.

### Does the HP EX950 512GB work in a laptop?

The EX950 512GB uses a double-sided M.2 2280 form factor, meaning components are mounted on both faces of the PCB. Most standard laptops accommodate double-sided M.2 drives, but some ultra-thin models may have clearance restrictions. Check the laptop's M.2 slot height specification before purchasing. Power draw is moderate for a PCIe 3.0 performance drive.

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Last updated: 2026-05-17. Source: https://ssdrive.net/hp-ex950-512-gb