# HP EX900 250GB — Budget DRAM-Less PCIe 3.0 NVMe SSD (2026)

The HP EX900 250GB is a budget-friendly PCIe 3.0 NVMe SSD that uses a DRAM-less design with HMB to keep costs down while maintaining acceptable performance.

Quick answer: The HP EX900 250GB is a competent budget PCIe 3.0 NVMe SSD with a DRAM-less HMB design that keeps costs down. It delivers adequate 2,100/1,300 MB/s speeds for everyday use, backed by a 3-year warranty. The DRAM-less design limits random I/O performance compared to the DRAM-equipped EX920. For the same money, the Kingston A2000 and WD Blue SN570 offer comparable or better performance with similar DRAM-less designs.

## Specifications

| Specification | Value |
| --- | --- |
| Capacity | 250 GB |
| Interface | M.2 3.0 x 4 |
| Controller | Silicon  Motion SM2263XT |
| Memory type | Micron TLC |
| DRAM cache | HMB |
| Sequential read | 2100 MB/s |
| Sequential write | 1300 MB/s |
| Random read IOPS | 120000 |
| Random write IOPS | 108000 |
| Endurance | 103 TBW |
| MTBF | 2 |
| Warranty | 3 years |

## Performance

The HP EX900 250GB is rated at up to 2,100 MB/s sequential reads and 1,300 MB/s writes. At 2,100 MB/s, the drive uses roughly 60 percent of the PCIe 3.0 x4 interface ceiling — respectable for a budget DRAM-less drive but well behind the DRAM-equipped EX920's 3,200 MB/s. The 1,300 MB/s write speed is adequate for a 250GB capacity, where fewer NAND dies constrain parallelism.

The DRAM-less HMB design is the primary bottleneck for random I/O performance. Without a dedicated memory buffer for the flash translation layer, the EX900 depends on system RAM and will show noticeable performance drops during sustained workloads. For everyday tasks — booting the OS, launching applications, loading games — the drive is serviceable. Tom's Hardware described the EX900 as delivering "solid performance for a DRAM-less design" but noted "low mixed workload performance" compared to DRAM-equipped alternatives.

The SLC cache behavior on the EX900 follows the dynamic caching pattern typical of SM2263XT-based drives. On a 250GB drive, the SLC cache will be moderate — perhaps 15-30 GB — meaning sustained writes beyond that threshold drop to direct TLC speeds. For budget buyers doing typical consumer workloads, the cache is sufficient. Anyone moving large files regularly should consider a DRAM-equipped drive.

## Endurance, TBW & Warranty

The HP EX900 carries a 3-year warranty, which is standard for budget-tier SSDs but shorter than the 5-year coverage on mainstream competitors like the Samsung 970 EVO. The endurance rating (TBW) for the 250GB variant is not published in the DB. Comparable 250GB TLC drives typically carry 100-170 TBW — the WD Blue SN550 250GB carries 150 TBW. At typical consumer write loads of 20-30 GB per day, a 250GB drive with ~150 TBW would last roughly 14-25 years before hitting the endurance limit.

## Pros and Cons

**Pros:**

- SM2263XT controller with HMB support
- Micron 3D TLC NAND (not QLC)
- 2,100 MB/s reads decent for budget drive
- Standard M.2 2280 form factor
- Budget-friendly pricing
**Cons:**

- DRAM-less design limits random I/O performance
- 3-year warranty shorter than 5-year competitors
- No published TBW endurance for 250GB
- 250GB capacity limiting for modern use
- Reviewed as expensive at launch for what it offers


## Verdict

The HP EX900 250GB is a competent budget PCIe 3.0 NVMe SSD with a DRAM-less HMB design that keeps costs down. It delivers adequate 2,100/1,300 MB/s speeds for everyday use, backed by a 3-year warranty. The DRAM-less design limits random I/O performance compared to the DRAM-equipped EX920. For the same money, the Kingston A2000 and WD Blue SN570 offer comparable or better performance with similar DRAM-less designs.

## Frequently Asked Questions

### Is the HP EX900 250GB good for gaming?

The HP EX900 250GB works as a budget gaming boot drive with 2,100 MB/s reads that are faster than SATA SSDs. However, the DRAM-less design means load times won't match DRAM-equipped drives. The 250GB capacity fills up quickly with modern games. For a similar price, the Kingston A2000 offers better performance.

### Does the HP EX900 250GB have a DRAM cache?

No, the HP EX900 250GB is a DRAM-less drive. It uses HMB (Host Memory Buffer), which borrows a small amount of system RAM for the flash translation layer. This keeps costs down but means random I/O performance trails drives with dedicated DRAM caches like the HP EX920.

### What is the TBW endurance of the HP EX900 250GB?

The TBW for the HP EX900 250GB is not explicitly published. Comparable 250GB TLC drives typically carry 100-170 TBW — the WD Blue SN550 250GB carries 150 TBW. At 20-30 GB per day, ~150 TBW equates to roughly 14-25 years of usage, well beyond the 3-year warranty.

### What controller does the HP EX900 use?

The HP EX900 uses the Silicon Motion SM2263XT controller, a DRAM-less NVMe controller designed for budget PCIe 3.0 x4 SSDs. The SM2263XT supports HMB, 3D TLC NAND, and NVMe 1.3 protocol. It's a common entry-level controller found in many budget drives.

### Does the HP EX900 need a heatsink?

The HP EX900 does not ship with a heatsink. As a budget PCIe 3.0 drive with moderate power draw, it doesn't generate significant heat. For typical consumer use, passive airflow is sufficient. The DRAM-less design actually runs cooler than DRAM-equipped alternatives.

### Is the HP EX900 250GB compatible with PS5?

No, the HP EX900 250GB is a PCIe 3.0 drive rated at 2,100 MB/s reads, below Sony's 5,500 MB/s requirement for PS5. For PS5 upgrades, look at PCIe 4.0 drives like the WD Black SN850X or Samsung 980 PRO.

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Last updated: 2026-05-23. Source: https://ssdrive.net/hp-ex900-250-gb