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.
Controller & Memory
The HP EX900 250GB uses the Silicon Motion SM2263XT controller paired with Micron 3D TLC NAND. The SM2263XT is a DRAM-less controller that relies on HMB (Host Memory Buffer), borrowing a small amount of system RAM for its flash translation layer. This design keeps costs down but means random I/O performance trails drives with dedicated DRAM caches like the HP EX920.
The 250GB variant is rated at 2,100 MB/s sequential reads and 1,300 MB/s writes. These are respectable numbers for a DRAM-less PCIe 3.0 drive, though they fall well short of the DRAM-equipped EX920's 3,200 MB/s reads. The EX900 was positioned as HP's budget NVMe option, competing against drives like the WD Blue SN550, Kingston A2000, and Crucial P1.
The 250GB capacity makes the EX900 suitable as a boot drive or light-use disk. The DRAM-less design is less of a concern at this price point, as budget buyers typically prioritize cost over peak performance.
Tom's Hardware reviewed the EX900 as a "DRAM-less design that relies on HMB architecture," noting solid performance for its class but acknowledging limitations in mixed workloads compared to DRAM-equipped alternatives.
Storage Comparisons:
EX900 Performance & Benchmarks
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.
HP EX900 250 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 EX900 250 GB (this drive): 2,100 MB/s read, 1,300 MB/s write
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.
HP EX900 vs Competitors
See how the EX900 stacks up against other M.2 3.0 x 4 drives in our database:
Compare with rival drives:
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.
HP EX900 250 GB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 250 GB |
| Interface [?] | M.2 3.0 x 4 |
| Controller [?] | Silicon Motion SM2263XT |
| Memory type [?] | Micron TLC |
| DRAM [?] | HMB |
| Read speed (MB/s) [?] | 2100 |
| Write speed (MB/s) [?] | 1300 |
| Read IOPS [?] | 120000 |
| Write IOPS [?] | 108000 |
| Endurance (TBW) [?] | 103 |
| MTBF (million hours) [?] | 2 |
| Warranty (years) [?] | 3 |
Verdict: Is the EX900 Worth It in 2026?
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.
+ 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
Buy this or similar SSD Storage:
Video Review
HP EX900 M.2 250GB PCIe NVMe Internal SSD Benchmark Test #DATA_RECOVERY_BD
