Need to know what PCIe Gen are the two SSD slots for Acer Nitro 5

Need to know what PCIe Gen are the two SSD slots for Acer Nitro 5 pcie 3 0 x4 slot An x4 PCIe device has a theoretical max transfer rate of MBsec according to wiki pcie x4 in x16 slot I bought a PCIe x4 NVMe SSD with a maximum read speed of approximately 3500MBs and I'm going to put it in a PCIe x4 slot

pcie x4 in x16 slot interface utilizes multiple technologies, including x2 to x4 PCIe Lanes, NVMe , SATA protocol, and USB

pcie 4 slot If three slots are in use, the third is x4 From the Asrock specs page  NVMe PCIe® x4 & PCIe® x2 • 1x PCIe ® Slot 2 2280 • NVMe PCIe x4 and SATA Mode 12 Smart Fan 5 + FAN STOP • 3 Fan