Hardware Spec Index

Tessarix PX-8638 XT Quad M.2 PCIe 4.0 x16 Card

PCIe Cards & NVMe Enclosures · Tessarix · SKU PX8638-XT · Released 2020 · Updated 2026-10-20

Key facts

Benchmark index4,089 (PCIe Cards & NVMe Enclosures scale)
Category rank#24,460
Street price$239
Power12 W
Performance per dollar17.11
Released2020

Specifications

BrandTessarix
ModelTessarix PX-8638 XT
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
CoolingHeatsink + 40 mm fan
Bus powerSlot-powered
CompatibilityUEFI boot supported; check slot bifurcation

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Cite this page: Hardware Spec Index, “Tessarix PX-8638 XT Quad M.2 PCIe 4.0 x16 Card”, https://vextor7.com/item/19955098 (accessed 2026-10-20).