Intel is going to launch it Solid State Drive product lines, including the X-18M, X-25M and X-25E. Both X-18M and X25-M are for notebook PCs and MIDs while the X-25E is for enterprise servers.
X-18M and X-25M is MLC(Multi-layer cell)-based SSDs that is available in 80GB and 160GB capacities, while the SLC(single layer cell)-based X25-E comes with 32GB and 64GB capacities.
As the model names suggest, the X-18M comes in 1.8-inch form factor and the X-25M and X-25E are in 2.5-inch form factor.