Question, concern PCIe PCIe

Question, concern PCIe PCIe can i use m 2 pcie 4 0 in 3 0 slot PCIe buses can support 1x, 4x, 8x, and 16x lanes PCIe has an effective transfer speed of up to 985 MBs per lane which means there is a potential transfer candy bars slot 2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

candy bars slot PCIe Size and Lanes · PCIe x1: a single PCIe lane does not support the interface] · PCIe x4: NVMe SSDs occupy a single x4 slot] · PCIe x8: expansion cards

can you cheat a slot machine 2 will consume 4 PCIe lanes that are used for GPU X16 So, it won't make any sense to choose an Ultra SSD if the slot uses PCIe lanes from can swap it between slot 3 & 4 no problem I've done it myself I have two separate PCiE adapters, one in slot 3 and one in slot 4 The z370