4 ram slots
Socket 7 Motherboards - Retro PC Store
JK-042E Socket 3 Motherboard, 486, 3 PCI and 4 ISA SLots, Edo Ram, UMC UM8881F.
NAS QNAP TS-453D-8G CPU Intel Celeron J4125 4-core ...
32GB ECC DDR4 RAM (4 x DIMMs, max 128GB total). 4 x 2.5GbE RJ45 LAN. 2 x 10GbE SFP+ SmartNIC. 3 x PCIe expansion slots.
2 vs 4 ram sticks
If you have 4 RAM slots, always buy the same pair of RAM (two sticks from the same company, same speed and same capacity) for best results.