Kestrix NS-5903 Ultra 6-Bay NAS (10GbE, M.2 Cache)
NAS Systems · Kestrix · SKU NS5903-ULTRA · Released 2019 · Updated 2026-10-19
Key facts
| Benchmark index | 6,091 (NAS Systems scale) |
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| Category rank | #35,711 |
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| Street price | $1,449 |
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| Power | 59 W |
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| Performance per dollar | 4.20 |
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| Released | 2019 |
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Specifications
| Brand | Kestrix |
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| Model | Kestrix NS-5903 Ultra |
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| Drive bays | 6× 3.5"/2.5" SATA, hot-swappable |
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| Max raw capacity | 144 TB |
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| Processor | 8-core x86, up to 3.4 GHz |
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| Memory | 32 GB DDR4 ECC |
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| Network | 1× 10GbE + 2× 2.5GbE |
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| M.2 NVMe slots | 2× (cache or storage pool) |
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| PCIe expansion | 1× PCIe 4.0 x4 slot |
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| RAID | RAID 0/1/5/6/10, JBOD |
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| File system | ZFS |
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| USB | 2× USB 3.2 Gen 1 |
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Related guides
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| Kestrix NS-3822 Ti 6-Bay NAS (2.5GbE, M.2 Cache) | 5,800 | $1,719 | Compare |
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Cite this page: Hardware Spec Index, “Kestrix NS-5903 Ultra 6-Bay NAS (10GbE, M.2 Cache)”, https://vextor7.com/item/417298 (accessed 2026-10-19).