Hardware Spec Index

Altrix PX-8558 Plus Quad M.2 PCIe 4.0 x16 Card

PCIe Cards & NVMe Enclosures · Altrix · SKU PX8558-PLUS · Released 2025 · Updated 2026-10-24

Key facts

Benchmark index3,731 (PCIe Cards & NVMe Enclosures scale)
Category rank#1,473
Street price$209
Power12 W
Performance per dollar17.85
Released2025

Specifications

BrandAltrix
ModelAltrix PX-8558 Plus
TypeQuad M.2 PCIe 4.0 x16 Card
Host interfacePCIe 4.0 x16, requires x4/x4/x4/x4 bifurcation
Throughput4× ~7,000 MB/s
Drive supportM.2 NVMe 2230 / 2242 / 2260 / 2280
CoolingPassive heatsink
Bus powerSlot-powered
CompatibilityUEFI boot supported; check slot bifurcation

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Cite this page: Hardware Spec Index, “Altrix PX-8558 Plus Quad M.2 PCIe 4.0 x16 Card”, https://vextor7.com/item/816540 (accessed 2026-10-24).