Home / Computers / The F4-421 has 4GB of DDR3 soldered with no slot to expandComputers Technology ramseeker nasThe F4-421 has 4GB of DDR3 soldered with no slot to expandThe F4-421 comes with 4GB of non-ECC DDR3 soldered directly to the board, and there’s no SO-DIMM slot for expansion. What it ships with is the ceiling. Shop NAS drives on Amazon As an Amazon Associate, Work Notes may earn.Related NotesTerraMaster F2-221 — a fixed 2-bay NAS, no expansion pathTerraMaster F4-421 — four internal bays, no PCIe or external expansionTerraMaster F8-421 — eight SATA bays, no PCIe or external expansionThe TerraMaster F2-223 has one upgradeable RAM slotThe TerraMaster F4-423 expands via USB 3.2 Gen 2ExploreThe Lenovo ThinkCentre M730q works with Intel 10th Gen on LGA 1200The Synology DS1621+ uses SATA drives with NVMe reserved for cachingThe Synology DS423+ pairs SATA drives with NVMe cache-only slotsThe TerraMaster F8-421 sticks to SATA drives with no NVMeThe TrueNAS Mini X+ sticks with SATA-only drive baysPrevious The Gigabyte B550 AORUS PRO runs PCIe 4.0 on the primary, Gen 3 for expansionNext The Eufy X10 Pro Omni is built for parents with hard floors and sleeping babies