The Intel X520-DA2 is not a great choice for use on a desktop platform because it's a PCIe 2.0 card. Desktop systems are very limited in the number of their PCIe lanes compared to servers or workstations (the intended platforms for that card). The PRIME Z690-P D4 only has x4 chipset slots available (other than it's GPU slot), so the card will never be able to run in x8 mode. PCIe 2.0 x4 would just about be sufficient for twin 10Gbit NICs (it's 5Gbit per lane), but it would be pushing the limits of the PCIe bandwidth and might slightly limit their performance; if the card supports running in a x4 slot. The additional slots are physically x16, but only wired for x4 (or x1). In general, you won't find secondary x8 slots on desktop platform boards, other than those where the slots split the GPU bandwidth into x8/x8. PCIe 4.0 x8 would generally be sufficient for a 3070Ti in most cases for general gaming; GPUs don't take full advantage of the x16 bandwidth other than at the top end or with very specific workloads.
You really need to look for a x4 card; dual interface would be possible on a PCIe 3.0 x4 card if you need that. Server/workstation cards can often be sub-optimal on desktop platforms. If a single port would be sufficient, you could use one of the ASUS cards: XG-C100C or XG-C100F.
