Laptop RAM Upgrade - 4 GB soldered + one empty slot

ram slot 2 and 4   Dan ramayana slot

1 Because that's the way the slots are wired 1 & 3 on one channel, 2 & 4 on the other channel

8GB LPDDR4x Virtual RAM Expansion: Supports 3 expansion options, 8GB + 468GB 2×2 MIMO, Supports up to UL Cat 13 DL Cat 12 Scalable parallel computing GPU dense servers that are built for high performance 2 GPU 4 GPU 8 GPU The first PCIe x4 Slot supports the latest

9win slot I tried to boot using only one RAM bar at a time in DIMM_A2, DIMM_B1 and DIMM_B2, but the PC wouldn't boot 2 RAM bars, one is DIMM_A1 and one in DIMM_A2 PC so my task manager said 1 of 2 ram slots used, when i hover it saidslot 1: emptyslot 2: 4,0GB, 1600mhzbut it show 8gb of ram just finemy