CPU
4th Generation Intel Haswell Dual Core i3-4000M/4100M or i5-4200M/4210M/4300M/4330M/4340M or i7-4600M or Intel Haswell Quad Core i7-4700MQ/4702MQ/4710MQ/4712MQ/4800MQ/4810MQ/4900MQ /4910MQ/4930MX/4940MX Processor
Memory Type
PC3L-12800 1600MHz DDR3L 204pin SO-DIMM Laptop Memory
Standard Memory
up to 16GB with dual core processor or up to 32GB with quad core processor
Max Memory
up to 16GB with dual core processor or up to 32GB with quad core processor
Memory Expansion Slots
2 SO-DIMM slots in models with dual core processor or 4 SO-DIMM slots in models with quad core processor
PC Card Slots
One ExpressCard/34 Slot
USB Ports
Two USB v3.0 Type-A Ports and Two USB v2.0 Type-A Ports and One Thunderbolt Port
Card Reader
4-in-1 Integrated SD Card Reader Slot: (SD/SDHC/SDXC/MMC)
Original Optical Drives
Removable DVD Burner Dual Layer Drive or Blu-Ray DVD Combo Drive
Original Hard Drives
500GB, 1TB 5400RPM or 7200RPM SATA III 6Gb/s Hard Drive or 500GB, 1TB 5400RPM 8GB MLC NAND SATA III 6Gb/s Solid State Hybrid Drive
Original Solid State Drives
128GB, 180GB, 240GB, 256GB, 512GB 2.5" SATA III 6Gb/s Solid State Drive or 16GB M.2 NGFF (2242) Solid State Drive in the WWAN slot for Caching (Supports OPAL 2.0 Encryption)
Drive Notes
The Lenovo ThinkPad W540 Laptop Supports up to 3 Drives. (One 2.5" Solid State Drive or Hard Drive in the Primary Bay and One M.2 (2242) Solid State Drive for Caching and One 2.5" Solid State Drive or Hard Drive in the Optical Bay) Note: The second 2.5" Drive replaces the optical drive when installed. If installing the second 2.5" Drive in replace of the optical drive, you will need the 2nd HDD ultrabay enhanced media bay tray p/n 04X1602 for installation.