Low-Latency High-Endurance Enterprise SSD
X3 / X7 / X9 · FAST NAND · 30–120 DWPD · KV cache/logs
X3/X7/X9 low-latency high-endurance enterprise SSDs on FAST NAND / XL-FLASH-class media — PCIe 3.0 compatibility J390X (30 DWPD), Gen4 J790X/J795X (60/100 DWPD) and Gen5 J990X/J995X (60/120 DWPD). Random-read latency down to the ~20 µs class, for metadata, logs, caching tiers and AI KV cache.
Product Models
Specification Comparison
| Model | NAND | Interface | Capacity | Key Specs |
|---|---|---|---|---|
| J990X | FAST NAND | U.2/U.3 · Gen5 x4 | 1.6TB | 60 DWPD · Ultra-Low Latency |
| J995X | FAST NAND | U.2/U.3 · Gen5 x4 | 0.8TB | 120 DWPD · Ultra-Low Latency |
| J790X | FAST NAND | U.2/U.3 · Gen4 x4 | 0.8–1.6TB | 60 DWPD · Ultra-Low Latency |
| J795X | FAST NAND | U.2/U.3 · Gen4 x4 | 0.4–0.8TB | 100 DWPD · Ultra-Low Latency |
| J390X | XL-FLASH | U.2/U.3 · Gen3 x4 | 0.75–1.6TB | 30 DWPD · Ultra-Low Latency |
Specifications as of ; see each model page and the official product guide for details.
Frequently Asked Questions
What endurance and interface does each model have?
J390X: PCIe 3.0, 30 DWPD; J790X/J795X: PCIe 4.0, 60/100 DWPD; J990X/J995X: PCIe 5.0, 60/120 DWPD. All are U.2/U.3 2.5-inch 15mm drives.
What latency and capacities can I expect?
Target random-read latency is 20–21 µs (20 µs on J390X/J790X/J795X, 21 µs on J990X/J995X) with 6.5–9 µs random write; capacities are deliberately small and high-endurance, from 0.4 TB to 1.6 TB.
What workloads are these drives for?
Metadata, logs, caching tiers and AI KV cache; J990X targets AI servers and real-time databases, J795X/J995X transaction logs and financial real-time trading, and J390X replacement of legacy low-latency platforms.
Other Product Lines
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