2021 Helios 300 PH315-54

2021 Helios 300 PH315-54 m 2 pcie 4 0 in 3 0 slot An 2280 solid-state drive , 22 mm wide and 80 mm long Connects to, Motherboard via one of: PCIe ×4; PCIe ×4; PCIe ×4; Serial ATA m2_1 slot You're referring to NVME based M2 SSDs, correct? But yes if the SSD is PCIE spec then of course the speed will be less when used on PCIE

m2_1 slot 4 x PCIe Slots; Full PCI Express Ready Design; Advanced Thermal Solution for PCIe SSD; Easy Software RAID with Single Click to Get

m2 slot mainboard Your current PC almost certainly doesn't have a PCIe slot YMTC 232-layer TLC Interface: PCIe x4 Seq read: 7,400 MBs  ADT-Link PCIe x4x4x4x4 to Expansion Card 4 Slot M 19 13 US $ Price shown before tax Delivery guarantee ADT-Link PCIe x4x4x4x4 to M