ThinkPad X40

Lenovo ThinkPad X-Series
MFR’s Description: Ultimate Mobility in a versatile ultraportable. The thinnest and lightest ultraportable ever
(select models). Models with Intel Centrino Mobile Technology – freedom and flexibility to connect wirelessly.

Note: Very similar to the ThinkPad X41, however the X40 offers an older chipset (both systemboard and graphics). There are some X40 models with an Ultra Low Voltage (ULV) Pentium M CPU, which the X41 series does not have.
Note: Some models with optional Extended Life Batteries and X4 UltraBase can go up to 11 hours without recharging, under certain conditions.

Reviews located at the bottom of the page.

Company/Manufacturing Information
Company: Lenovo
Company Website:
Model Name: ThinkPad X40
Product Page:
Type: Laptop
Introduced: ?
Cost (MSRP/Street): Base $1499 and on up (see product page for pricing)
CPU/Processor & Chipset
Processor Company: Intel
Processor Model: Pentium M Ultra Low Voltage (ULV) 733 or 753
Some models with Pentium M Low Voltage 738, 758, 778 CPUs
Processor Speed: 1.10GHz – 1.20GHz (ULV), 1.40GHz – 1.60GHz,
Bus Speed: 400MHz
Cache Size: 1MB – 2MB
Cache Type: L2
Systemboard Chipset: Intel 855GME
Display and Graphics
Graphics Chipset: Intel Extreme Graphics 2 (855GME)
Screen Type: LCD TFT
Screen Size: 12.1″
Widescreen: No
Resolution: 1024×768 XGA
Video Memory:
Video Out: Yes
Touchscreen: No
Memory Capacity: 1.256GB – 1.5GB (256MB – 512MB Onboard?)
Memory Slots: 1
Memory Type: DDR SDRAM
Memory Speed: 333MHz PC2700
Shared With Video: Yes
Hard Drive Interface: ATA-100 IDE
Hard Drive Capacity: 30GB – 40GB (4200rpm)
Hard Drive Physical Size: ? (Possibly 1.8″)
Optical Drive: Optional (X4 UltraBase)
Harddrive Shock Protection: Yes – “Active Protection System”
Battery Type: Lithium-Ion
Default Battery Size: 14.4V 4-cell
Mfr Estimated Runtime: Up to 7.0 hours, Optional Extended Life Battery Available for some models
Dimensions, and Weight
Weight: Around 2.7lbs – 3.30lbs
Height: 0.81″
Width: 10.5″
Depth: 8.3″
Wireless: Optional, Depending on Model: Some models have Intel PRO/Wireless 2200BG
Wireless Type: 802.11b/g
Ethernet: Gigabit Ethernet
Modem: 56K V.92
Keyboard: Fullsize
Mouse: TrackPoint
I/O Ports
USB Ports: 2xUSB 2.0 (1 Powered)
Firewire (IEEE 1394): ?
PS/2, Serial, Parallel: No
Infrared: Yes
PC Card Slots: 1x PCMCIA PC Card Type I/II
Flash Memory Card: ?
Bluetooth: Yes, 1Mbps
Port Replicator: Yes, Optional
Other I/O: Expansion Bus for X4 Dock
Audio Chipset: SoundMAX
Audio I/O: External Microphone/Line-In, Headphone/Line-Out, Speakers
Installed OS: Microsoft Windows XP Professional
Supported: Microsoft Windows 2000, Microsoft Windows NT 4.0, Microsoft Windows XP Home Edition
Included Software: Other – May include 3rd Party Software such as Adobe Acrobat, etc. – See Model Pages for full software list
Protection and Security
Fingerprint Reader: Maybe available – available for certain on X41.
Hardware Passwords: Yes
Other: Embedded Security Subsystem
Varied: 2386BH (ULV), 2386MCU (ULV), 2386N8U, 2386QAU, 2386KLU, 2371GHU, 2382JEU, 2386QBU, 2382KPU, 2386REU, 2382QDU, 2382RFU,
Warranty, Misc


TrustedReviews – June 2004 – 9 out of 10 – TrustedReviews “Recommended” – IBM has come pretty close to producing the perfect ultra-portable notebook in the shape of the X40.

HardwareCentral – April 2005 – 4 out of 5 stars – We’d rather watch a movie on the Sony, but we’d rather crunch through messages, spreadsheets, and presentations on the IBM.