pci and pci express slots
Motherboard Ports: What They Are and How They Work - Lifewire
There are two types of PCI slots: PCI and PCI Express (PCIe). The PCIe slot is a larger, faster version of the PCI slot and usually houses your graphics card.
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This configuration has the advantage of implementing two-way SLI, while only occupying one PCI Express slot and (usually) two expansion I/O slots.
Colorful Debuts iGame Duo SSD: GPU with Two M.2 Drives | TechPowerUp
The Crucial P3 provides good performance in a PCI Express 3.0 NVMe SSD ... You can have this PCI Express 3.0 NVMe stick for a song—and it won't have you singing the blues.
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PCIe 1 To 4 PCI Express 1X Slots Card ITX To External 4 PCI-e Slot Adapter PCIe Port Multiplier Card ASM1184 : Amazon.ie: Electronics