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Detailed specifications - ThinkPad G40
CommunicationsOperating environmentStorage

  • Analog Devices AD1981A AC'97 SoundMAX- Codec
  • AC97 2.2 compatible
  • Speaker technology
    • stereo speaker
  • Volume up, down, and mute buttons
  • Two audio jacks:
    • 1/8" Input Jack, Mono Microphone
    • 1/8" Stereo Headphone Output Jack
  • 86 key keyboard with imbedded numeric keypad and integrated UltraNav dual-pointing system, featuring TrackPoint and customized touch pad for the ultimate in pointing flexibility
  • 90 DBCS key keyboard with imbedded numeric keypad and integrated UltraNav dual-pointing system, featuring TrackPoint and customized touch pad for the ultimate in pointing flexibility
  • The keyboard has a Fn key which is a special key and is located in the lower left corner. The Fn key allows the user to instantly activate the following operational features by pressing the Fn key and a designated function key:
    • Standby/Suspend/Hibernation
    • Switching between Display device
  • 64-bit Double Data Rate (DDR) non-parity SDRAM memory
  • PC2100 at 266MHz
  • Two 200 pin SO-DIMM memory slots, one slot is pre-populated with 128MB or 256MB, leaving one socket available
  • Supports up to two 512MB SDRAM SO DIMM
  • Supports maximum memory up to 1GB
  • All systems come with the TrackPoint pointing device with Internet scroll bar, (requires Internet access, not included) Press-to-Select, and magnifying functions to help you breeze through Web pages and spreadsheets
  • Available processors are
    • Intel Pentium 4 DT at 2.4GHz, 2.6GHz, 2.8GHz, 3.0GHz
    • Intel Celeron DT at 2.0GHz
  • CPU throttling
  • Pentium models have 512KB onboard L2 cache memory
    Celeron models have 128KB onboard L2 cache memory

  • Selected models have a modem communication daughter card (CDC)
  • K56Flex v.92
Note: Public network download speeds are limited to 53kbps. Upload speeds are limited to 48Kbps. Actual speeds depend on many factors and are often less than the maximum stated.
  • 10/100 Ethernet installed on systems via the system board
  • Intel 802.11b wireless LAN on selected models
  • IBM High Rate Dual-band 802.11a/b Wireless on selected models

  • One Mini PCI III slot (not CRU)
  • One CDC II slot (not CRU)
External ports
  • Four USB ports version 2.0
  • One parallel (EPP, ECP) compatible
  • Two audio ports
    • One for external stereo speakers or headphone
    • One for microphone-in
  • CRT port for external monitor
  • Built-in RJ-11 and RJ-45 connectors for telephony and LAN connections
PC Card
  • Conforms to the PC Card Standard 95
  • The Type III slot can accommodate one Type I, one Type II, or one Type III PC card
  • Both 16-bit and 32-bit cards are supported.
  • PCMCIA 2.1 standard
  • No zoom video support

Operating environment
Physical specificaitons


  • Width: 329.0 mm (12.95 in)
  • Depth: 282.5 mm (11.12 in)
  • Height: 37.1 to 50.9 mm (1.46 to 2.00 in)
  • Weight:
    • 14.1 in: 3.5 kg (7.6 lb)
    • 15.0-in: 3.6 kg (7.9 LB)


  • Li-Ion 6-cell: 355 g (0.78 LB)
  • Li-Ion 12-cell: 627 g (1.38 LB)
  • NiMH 8-cell: 570 g (1.26 LB)

Note: Actual specifications and weights may vary based on features, vendor components, or manufacturing processes.

Temperature specifications
  • Heat dissipation: 410 Btu/hr maximum
  • Heat emissions: 120 watts maximum
Agency approvals
  • FCC Class-B certified to comply with FCC Rules, Part 15
  • VCCI Class B
  • CISPR22B
  • UL-1950
  • CSA C22.2 No. 950
  • NOM
  • SASO
  • IEC950
  • ACA
  • MPR-II (Sweden)
  • CE Mark 1
  • CCC (for China)
  • BSMI
  • JATE
  • CER

AC Adapter
  • AC adapter: This ac-to-dc converter supplies the necessary power to the computer. The ac adapter also charges the battery pack when it is installed in the computer.
  • Universal AC adapter (120 W):
    • Input is 100/240 V ac, 1.5 A, 50/60 Hz
    • Output is 16 V dc, 7.5
  • The battery pack is an internal power source to the computer when the ac adapter is not available. The battery pack is rechargeable and is charged using the ac adapter with the system.
  • You can determine how much battery power remains by using the fuel- gauge ThinkPad utility program, which displays the percent charge remaining.
  • A different Li-Ion battery pack fits into the Ultrabay Slim so that two batteries can be installed to increase battery operating time.
  • A six or twelve cell Li-Ion battery or an eight cell NiMH battery pack is shipped with the system.
  • Battery pack:
    • Li-Ion
      • 6 cell: 10.8 V, 4.4 AH
      • 12 cell: 10.8 V, 8.8 AH
    • NiMH
      • 8 cell: 9.6 V, 4.5 AH
  • Approximate operation and charging time
    State of operation8 cell NiMH6 cell Li-Ion12 cell Li-Ion
    Power off/suspend charging2.5 hours3.0 hours4.5 hours
    Charging during operation3.5 hours3.0-5.0 hours4.5-8.5 hours
    Hours of operation
    6 cell Li-Ion battery1 hour 45 minutes
    8 cell NiMH battery1 hour 12 minutes
    12 cell Li-Ion battery3 hours 30 minutes


  • (*1) Recharge time also varies.
  • (*2) These model numbers achieved eTesting Labs, Inc.'s BatteryMark 4.0.1 or the Ziff Davis Media Inc.'s Business Winstone 2002 BatteryMarkTM Version 1.0 Battery Rundown Time of at least the times shown above. This test was performed without independent verification by VeriTest testing division of Lionbridge Technologies, Inc. ("VeriTest") nor Ziff Davis Media Inc.; neither Ziff Davis Media Inc. nor VeriTest makes any representations or warranties as to these test results. A description of the environment under which the test was performed is available at: Battery life (and recharge times) will vary based on many factors including screen brightness, applications, features, power management, battery conditioning and other customer preferences.

  • A locking device in the security slot provides physical security.
  • A Power-on password (POP) protects the system from unauthorized use. If a POP is set, the password prompt appears:
    • Each time the system is turned on
    • When the system is returned to normal operation from suspend mode
  • A Supervisor Password provides a higher level of security than the POP. The Supervisor Password protects the system functions from being used by unauthorized users,and protects the hardware configuration from unauthorized modification. The Supervisor Password prompt appears:
    • When the BIOS setup screen is accessed.
  • A HDD Password (HDP) protects HDD data from unauthorized users. Once HDP is set, data on the HDD cannot be accessed without the correct HDP. Because the HDP is stored in the HDD, the data remains protected even if the HDD is removed to another system. The HDP password prompt appears:
    • Each time the system is turned on

Operating system
The following operating systems are supported on the ThinkPad G40 systems:
  • Windows XP Professional
  • Windows XP Home Edition
  • Windows 2000 Professional
  • Windows 98 SE

Note: Previous versions of these operating systems are not supported.

Optical drive
  • 24x/10x/24x/8x CDRW/DVD
  • Bootable
Floppy drive
  • Included with all models as a fixed drive.
Hard disk drive (HDD) features
  • Supported HDD thickness: 9.5mm for all systems
  • Standard 20GB, 30GB, 40GB, 60GB HDD sizes.
  • S.M.A.R.T technology to issue an alert if a hardware failure is pending
  • ATA Bus Interface

  • 14.1 inch XGA(1024x768)
  • 15 inch XGA (1024x768)
  • 15 inch SXGA+(1400x1050) TFT color

  • All displays are measured diagonally.

Graphic Controller
Integrated Intel Extreme Graphics with dynamic video memory technology, up to 32MB (UMA)
ResolutionLCD Color depth - 1024x768
640x480256, 64k, 16M
800x600256, 64k, 16M
1024x768256, 64k, 16M
1280x1024256, 64k, 16M
1400x1050NA, NA, NA
1600x1200256, 64k, 16M
ResolutionLCD Color depth - 1400x1500
640x480256, 64k, 16M
800x600256, 64k, 16M
1024x768256, 64k, 16M
1280x1024256, 64k, 16M
1400x1050256, 64k, 16M
1600x1200256, 64k, 16M
  • (*1) - Supported in panning mode only.
  • (*2) - Supported in panning mode only on the 1024x768 LCDs.
ResolutionSupported refresh rates in Hz for external monitors
640x48060, 72, 75, 85, 100, 120 Hz
800x60060, 72, 75, 85, 100, 120 Hz
1024x76860, 70, 75, 85, 100, 120 Hz
1280x102460, 75, 85, 100, 120 Hz
1600x120060, 75, 85 Hz
Note: When the LCD and external monitor are used at the same time, the refresh rate may be lower.

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Document ID : PD011272
Legacy Document ID : MIGR-58232
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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