It is not fitting in slot what shall I do as it has a case on.Memory
2 x 1.8V DDR2 DIMM sockets supporting up to 8 GB of system memory (Note 1)
Dual channel memory architecture
Support for DDR2 1066/800/667 MHz memory modules
Yes ik it’s a fb dimm and my motherboard doesn’t support itThe slot has locks on each end that should be pushed away from the ram slot. The socket itself is keyed, there's a plastic piece that has to line up with the slot on the ram. If it doesn't fit in either direction, then verify that you actually do have the right kind of ram and it is ddr2 and not sdram or ddr3 or laptop ram.