cheapest motherboard with 4 pcie slots - What are Small PCIe x1 Slots Used For? - CGDirector 888 slot 35

We recommend a minimum of 8 PCIe Gen 4 lanes per physical x16 slot on the motherboard for a four-GPU build. You may use fewer GPUs and populate the empty PCIe slots with storage or network cards, depending on your requirements.

"I found that only this matx motherboard provides 2.5g lan, ax wifi, 4 pcie slots, 2 m.2 slots, 6 sata ports with a reasonable price.".

PRIME B560-PLUS Intel® B560 (LGA 1200) ATX motherboard features PCIe 4.0 support with SafeSlot core+, two M.2 slots with one flexible M.2 heatsink, USB 3.2 Gen 2, Thunderbolt™ 4 support and Intel® 1 Gb Ethernet.