Mac Pro 4,1 to 5,1 RAM slot 1 not recognized

ram slot 2 and 4   Dan rams slot receiver

In a ram slot configuration, 1 being the slot closest to the CPU, and 4 being furthest, typically using 2 sticks of ram it should be placed in

8GB LPDDR4x Virtual RAM Expansion: Supports 3 expansion options, 8GB + 468GB 2×2 MIMO, Supports up to UL Cat 13 DL Cat 12 PCIe NVMe SSDs can use various form factors such as add-in card , , and Why and how to upgrade your HP system with new RAM andor an SSD

eagles flight slot 2 Sticks of RAM are generally less expensive than 4 Sticks · It's easier to push higher memory speeds and lower CAS latencies with fewer sticks · Dual Channel You need to use 2 & 4 or 1 & 3 otherwise it will only operate in Single-Channel mode instead of Dual-Channel and it'll perform worse