Hardware Spec Index

Altrix PX-6921 Ultra M.2 NVMe to PCIe 4.0 x4 Adapter

PCIe Cards & NVMe Enclosures · Altrix · SKU PX6921-ULTRA · Released 2022 · Updated 2026-10-20

Key facts

Benchmark index670 (PCIe Cards & NVMe Enclosures scale)
Category rank#46,870
Street price$19
Power6 W
Performance per dollar35.26
Released2022

Specifications

BrandAltrix
ModelAltrix PX-6921 Ultra
TypeM.2 NVMe to PCIe 4.0 x4 Adapter
Host interfacePCIe 4.0 x4 (passive)
ThroughputUp to 7,500 MB/s (drive-limited)
Drive supportM.2 NVMe 2230 / 2242 / 2260 / 2280
CoolingPassive heatsink
Bus powerSlot-powered
CompatibilityUEFI boot supported; check slot bifurcation

Related guides

NVMe SSDs ExplainedPCIe Lanes ExplainedUSB4 ExplainedThunderbolt 5 ExplainedPCIe 5.0 Explained

Similar PCIe Cards & NVMe Enclosures

ModelBenchmarkPriceCompare
Strivon PX-8893 Plus Thunderbolt 5 NVMe Enclosure4,560$279Compare
Veltrix PX-5001 Ultra USB 3.2 Gen 2 NVMe Enclosure2,362$99Compare
Altrix PX-6906 Ti Dual M.2 PCIe Switch Card5,067$379Compare
Veltrix PX-6850 Pro PCIe 4.0 x16 Riser Cable2,120$69Compare
Veltrix PX-4311 XT M.2 NVMe to PCIe 4.0 x4 Adapter1,585$39Compare
Strivon PX-1475 XT M.2 NVMe to PCIe 4.0 x4 Adapter1,445$39Compare

All PCIe Cards & NVMe Enclosures · JSON

Cite this page: Hardware Spec Index, “Altrix PX-6921 Ultra M.2 NVMe to PCIe 4.0 x4 Adapter”, https://vextor7.com/item/85640734 (accessed 2026-10-20).