Tessarix PX-8257 Ultra M.2 NVMe to PCIe 4.0 x4 Adapter
PCIe Cards & NVMe Enclosures · Tessarix · SKU PX8257-ULTRA · Released 2020 · Updated 2026-10-22
Key facts
| Benchmark index | 3,200 (PCIe Cards & NVMe Enclosures scale) |
|---|---|
| Category rank | #26,023 |
| Street price | $139 |
| Power | 6 W |
| Performance per dollar | 23.02 |
| Released | 2020 |
Specifications
| Brand | Tessarix |
|---|---|
| Model | Tessarix PX-8257 Ultra |
| Type | M.2 NVMe to PCIe 4.0 x4 Adapter |
| Host interface | PCIe 4.0 x4 (passive) |
| Throughput | Up to 7,500 MB/s (drive-limited) |
| Drive support | M.2 NVMe 2230 / 2242 / 2260 / 2280 |
| Cooling | Heatsink + 40 mm fan |
| Bus power | Slot-powered |
| Compatibility | UEFI boot supported; check slot bifurcation |
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Cite this page: Hardware Spec Index, “Tessarix PX-8257 Ultra M.2 NVMe to PCIe 4.0 x4 Adapter”, https://vextor7.com/item/53478737 (accessed 2026-10-22).