page_title: ThinkPad X series
section_title: X240 and X240s
hierarchical_section_title: ThinkPad X series / Lenovo-branded models / 2013 / X240 and X240s
caption_attribution_description: English: Lenovo Thinkpad x240
context_page_description: The ThinkPad X series is a line of notebook computers and convertible tablets originally produced by IBM and now marketed by Lenovo.
  IBM announced the ThinkPad X series in September 2000 with the intention of providing “workers on the move with a better experience in extra-thin and extra-light mobile computing.” The ThinkPad X series replaced both the 240 and 570 series during IBM's transition from numbered to letter series during the early 2000s. The first X Series laptops were "slimmer than a deck of cards" and "lighter than a half-gallon of milk", despite the presence of a 12.1-inch Thin-film transistor display. These design values—thin and light—continued to be integral to the ThinkPad X-series laptops' design and marketing, even after the purchase of IBM's Personal Computing Division by Lenovo. The first X Series ThinkPad released by Lenovo was the X41 in 2005.
  The ThinkPad X-series laptops from Lenovo were described by Trusted Reviews as "combining an ultraportable's weight and form factor with a durable design." The X-series laptop styles include traditional ultraportables, as well as convertible tablet designs.
context_section_description: The ThinkPad X240 replaced the earlier X230 and X230s. Compared to the X230, the X240 changed from the higher-power Intel Core CPUs labelled as "mobile class", to the lower-power CPUs labelled "ultrabook class". Depending on the CPU model, the change resulted in a 10%–20% reduction in CPU performance compared to the older, but higher power Ivy Bridge generation CPUs. This was the first X-series laptop to forgo the classic TrackPoint buttons in favor of a touchpad that can also be pushed. The X240 reduced the maximum physical memory to 8 GB, with only one memory slot, making dual-channel unavailable (compared to 16 GB dual-channel in two memory slots on the X230), lost the dedicated insert key and volume control keys. The X240 uses the rectangular "slim tip" power plug.
  The X240s is a slimmed down and lighter, Asian-market-only version of the X240 with the docking port missing and Power Bridge hot-swappable battery replaced with two internal batteries rated at 23.5 Wh each, which by extension removes the option to install larger 6-cell batteries in place of the default 3-cell.
caption: X240
exif: {"Thumbnail ImageWidth": "256", "Thumbnail ImageLength": "182", "Thumbnail BitsPerSample": "[8, 8, 8]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail PhotometricInterpretation": "6", "Thumbnail SamplesPerPixel": "3", "Thumbnail JPEGInterchangeFormat": "122", "Thumbnail JPEGInterchangeFormatLength": "9393"}