Kestrix NS-5621 Ultra 4-Bay NAS (2.5GbE, M.2 Cache)
NAS Systems · Kestrix · SKU NS5621-ULTRA · Released 2023 · Updated 2026-10-20
Key facts
| Benchmark index | 4,940 (NAS Systems scale) |
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| Category rank | #47,532 |
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| Street price | $1,039 |
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| Power | 45 W |
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| Performance per dollar | 4.75 |
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| Released | 2023 |
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Specifications
| Brand | Kestrix |
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| Model | Kestrix NS-5621 Ultra |
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| Drive bays | 4× 3.5"/2.5" SATA, hot-swappable |
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| Max raw capacity | 96 TB |
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| Processor | 6-core x86, up to 3.2 GHz |
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| Memory | 16 GB DDR5 ECC |
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| Network | 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 | Btrfs, ext4 |
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| USB | 2× USB 3.2 Gen 2 (10Gbps) |
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Related guides
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Cite this page: Hardware Spec Index, “Kestrix NS-5621 Ultra 4-Bay NAS (2.5GbE, M.2 Cache)”, https://vextor7.com/item/20073317 (accessed 2026-10-20).