2 Types of SSDs: SATA and NVMe

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2 drive I have 2 GPUs One RTX 3090 and one RTX 2080 The mainboard has 4 special M2 slots with heat sinks and 4 regular PCIe slots

EZ-Latch Click： heatsinks with screwless design; EZ-Latch Plus：PCIe x16 slot & slots with quick release design; UC BIOS：User-Centred intuitive PCI-SIG also authored standards for SSDs, which provides PCIe connectivity for small form factors and is designed for internally mounted expansion cards

77 neko slot Hi, I currently am using a Pi 5 and I have connected via a Blue USB slot an External SSD enclosure, with an PCIe Gen 4 NVMe SSD in it  The Slots closest to the CPU which are controlled by the CPU is the fastest for NVME Type SSDs The PCIe expansion card probably will not