Do extra PCIe lanes improve latency?

A PCIe x8 to dual NVMe card typically requires the ability to access two separate PCIe x4 lanes, one for each drive Normally this can

Most of those cards are x16 and their switches split to x4x4x4x4 But there are x8 cards with 4 sockets which then split to x2x2x2x2 Check

m2 pcie slot PCIe lanes to support both a PCIe x16 graphics card slot and a PCIe x4 NVMe SSD slot, but the older 12th Generation Alder

m2 pcie 40 in 30 slot If you're looking to add a PCI ExpressNVMe drive to a desktop with an older motherboard that lacks slots, one option is an drive on a carrier card