Your motherboard may restrict the number of lanes available.
Your motherboard may restrict the number of lanes available.
I possess this setup... - The ROG Strix X570-E GAMING is connected via a 2060 to PCIEX16_1, while an AORUS NVMe Gen4 SSD of 1TB is installed on M2_2 (SOCKET3). When considering adding a 4-lane PCI-E SATA card to PCIEX16_3, the motherboard's chipset allows it without restricting PCIEX16_1's lane limit to 8. Yes, the expansion card won't impose that constraint.
Sure! The manual clarifies that X1_2 and 16_3 are chipset-supported, allowing up to four lanes shared between them. For 16_1 and 16_2, the support depends on your CPU, which can handle either a 1x16 or 2x8 configuration. You might find more details about the PCI-E x16 slots later in the guide.
They created a very confusing setup but essentially the two highest X16 slots can be used as X16 or split into X8 and X8 with both occupied. After that, the rest of the configuration becomes irrelevant since it's handled by the chipset. The point being discussed is that the third long slot shares space with the second X1 slot.
I was just trying to figure it out. Parity really fits here. You're probably on the right track.