# ThinkPad G series

The ThinkPad G series is a series of desktop replacement ThinkPad laptops made by IBM. The short-lived series is the only ThinkPad series to use a desktop CPU (except G50), being produced from 2003 to 2006 with three generations released.

## G40 and G41

The G40 and G41 were based on an Intel Pentium 4 and were released as low-end, affordable and massive successors of Pentium 4-M-equipped 15" ThinkPad A31 and 14" ThinkPad T30.
In a review by CNET in 2004, the G40 was given a 7.3 stating that while the laptop was big and heavy with a mediocre screen, the ThinkPad G40 "proves you can get a capable desktop replacement at an affordable price without sacrificing battery life and performance."
In another review by ZDNet in 2003, recommending the G40 to people who want the capabilities of a desktop but not the clutter, the author stated that the G40's "keyboard is comfortable, the screen easy to read, and the specifications, features and performance about right for a typical home/home office PC."
In their review of the G40 in 2003, The Register commented on the laptops 3.5kg weight contradicting "IBMs talk of the mobile worker, and not sacrificing power for portability." They also expressed concerns of the Access IBM button being a "scarily Big Brother single button access to Big Blue" but did ease the concern by explaining the actual reason as making the G40 easier to deploy in a corporate environment. The Register concluded that the G40's ideal user was the "migrant": "Working in a flexible office environment, and occasionally from home."
As a sign of their low cost placement, the G40 and G41 did not include a ThinkLight, docking connector, nor stereo speakers. Though they have both a floppy drive and an optical drive, both do not have eject mechanisms and the optical drive bay is not an Ultrabay. They also were not optionable with IPS screens nor trackpad. While they both use desktop CPUs, they also used anemic Intel integrated graphics with only some G41's optioned with NVIDIA Geforce FX Go5200 graphics.
Both models have the option of either 15" or 14.1" screens with same case. For the 14.1" screen option, the both the G40 and the G41 were offered with XGA(1024x768). For the 15" screen option, both models were offered with either XGA(1024x768) or SXGA+(1400x1050) displays.

## G50

The G50 was released in 2006. It retained the overall design of G40 and G41 but was based on the new Intel Core architecture which consumes less power than previous Pentium 4 processors. With the shift to the new architecture, the G50 now used SATA instead of IDE hard drives and used DDR2 instead of DDR SDRAM.
The G50 is only available in 15" screen size with either XGA(1024x768) or SXGA+(1400x1050) resolutions and was only sold in Japan.
Battery configuration
| Main | M(x) | Main hot-swappable (max.cells) | Secondary | U | Ultrabay removable |
| Main | M(x) | Main hot-swappable (max.cells) | Secondary | u | Ultrabay unremovable |
| Main | M(x) | Main removable (max.cells) | Secondary | m(x) | internal (max.cells) "PowerBridge" |
| Main | m(x) | Main internal (max.cells) | Secondary | S | Slice battery |
Laptop color codes :
| PCIe 4.0 x4 | PCIe 3.0 x4 | PCIe 3.0 x2 | M.2 SATA | mSATA | 1.8" SATA | 2.5" SATA | 1.8" IDE | 2.5" IDE |
| 2019 Not yet (laptops) | 2013 | 2013 | 2013 | 2009 | 2003 | 2003 | 1991 | 1988 |
| 3 | | | | | | 2 | | |
| 4 | | | | | | | | |
| 3 | | | | | | 1 | | |
| 2 | | | | | | 2 | | |
| 3 | | | | | 2 | | |
| 3 | | | | | | | | |
| 2 | | | | | | 1 | | |
| 4 | | | | | | | |
| 3 | | | | | 1 | | |
| 2 | | | | | 2 | | |
| 2 | | | | | | | | |
| 1 | | | | | | 1 | | |
| 3 | | | | | | | |
| 2 | | | | | 1 | | |
| 1 | | | | | | | | |
| 2 | | | | | | | |
| 1 | | | | | 1 | | |
| | | 2 | | | | 1 | | |
| | | | | | | 4 | | |
| | 1 | | | | | | | |
| | | 1 | | | | 1 | | |
| | | | | | | 3 | | |
| | | 1 | | | | | | |
| | | | 1 | | | 1 | | |
| | | | | 1 | | 1 | | |
| | | | | | 1 | 1 | | |
| | | | | | | 2 | | |
| | | | | | | | | 3 |
| | | | | | 1 | | | |
| | | | | | | 1 | | |
| | | | | | | | | 2 |
| | | | | | | | 1 | |
| | | | | | | | | 1 |
| Amount | LPDDR5X | LPDDR5 | DDR5 | LPDDR4X | LPDDR4 | DDR4 | LPDDR3 | DDR4 | DDR3L | DDR3L | DDR3 | DDR3 | DDR2 | DDR2 | DDR | SDR | EDO | FPM |
| Amount | | | | | | dual channel | | < dual channel | dual channel | < dual channel | dual channel | < dual channel | dual channel | < dual channel | | | | |
| Amount | 2022 (laptops) | 2019 (laptops) | 2020 | 2017 | 2014 | 2014 | 2012 | 2014 | 2010 | 2010 | 2007 | 2007 | 2003 | 2003 | 1998 | 1993 | 1993 | 1987 |
| max memory = 512 GB | N/A | N/A | 512 GB | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| max memory = 256 GB | N/A | | 256 GB (4 slots) | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| max memory = 128 GB | 128 GB | | 128 GB | N/A | N/A | 128 GB (4 slots) | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| 64 GB ≤ max memory < 128 GB | | 64 GB | | N/A | N/A | 64 GB | N/A | 64 GB (2 slots) | 64 GB (4 slots) | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| 32 GB ≤ max memory < 64 GB | | | | 32 GB | 32 GB | 32 GB | N/A | | 32 GB | 32 GB (2 slots) | 32 GB (4 slots) | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
| 16 GB ≤ max memory < 32 GB | | | | | | 16 GB | 16 GB | | 16 GB | | 16 GB | 16 GB (2 slots) | 16 GB (4 slots) | N/A | N/A | N/A | N/A | N/A |
| 8 GB ≤ max memory < 16 GB | | | | | | 8 GB | | | 8 GB | | 8 GB | | 8 GB | 8 GB (2 slots) | 8 GB (4 slots) | N/A | N/A | N/A |
| 4 GB ≤ max memory < 8 GB | | | | | | 4 GB | | | 4 GB | | 4 GB | | 4 GB | | 4 GB | 4 GB (4 slots) | 4 GB (4 slots) | N/A |
| 2 GB ≤ max memory < 4 GB | | | | | | 2 GB (8 chips) | | | 2 GB | | 2 GB | | 2 GB | | | 2 GB | 2 GB | N/A |
| 1 GB ≤ max memory < 2 GB | | | 1 GB (1 chip) | dual channel min | dual channel min | N/A | | single channel min | 1 GB | | 1 GB | | 1 GB | | | | | 1 GB (4 slots) |
| 512 MB ≤ max memory < 1 GB | N/A | N/A | N/A | single channel min | single channel min | N/A | dual channel min | half channel min | 512 MB (8 chips) | | 512 MB (8 chips) | | 512 MB | | | | | 512 MB |
| 256 MB ≤ max memory < 512 MB | N/A | N/A | N/A | 256 MB (1 chip) | 256 MB (1 chip) | N/A | single channel min | 256 MB (1 chip) | N/A | single channel min | N/A | single channel min | 256 MB | | | | | |
| 128 MB ≤ max memory < 256 MB | N/A | N/A | N/A | N/A | N/A | N/A | 128 MB (1 chip) | N/A | N/A | half channel min | N/A | half channel min | | | | | | |
| 64 MB ≤ max memory < 128 MB | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 64 MB (1 chip) | N/A | 64 MB (1 chip) | | | | | | |
| max memory < 64 MB | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | | | | | | |

## Specifications

| Model | Release (US) | Dimensions $^{(w,d,h)}$ | Weight $^{(min)}$ | CPU | Chipset | Memory $^{(max)}$ | Graphics | Storage | Networking | Screen | Battery | Other |
| G40 | Apr 2003 | 329mm x 282.5mm x 50.9mm (12.9" x 11.1" x 2.0") | 3.47 kg (7.7 lb) | Intel Celeron or Pentium 4 $^{(Northwood)}$ FSB: 400MT/s | Intel 852GM | 1GB $^{(2xDDR-266SO-DIMM)}$ | Intel Extreme Graphics | One 2.5" IDE | Broadcom BCM5901 Agere 56K Modem $^{inCDCslot}$ Optional 802.11b or g WLAN $^{inmPCIslot}$ | CCFL backlit XGA(1024x768) 14" or 15" or SXGA+(1400x1050) 15" TN TFT LCD | M(12) | One 3.5" 1.44MB Floppy drive $^{(Unremovable)}$ One Slimline Optical drive bay $^{(Unremovable)}$ ThinkPad ComfortSlant keyboard |
| G41 | Oct 2004 | 329mm x 282.5mm x 50.9mm (12.9" x 11.1" x 2.0") | 3.5 kg (7.7 lb) | Intel Celeron or Mobile Pentium 4 HT $^{(Prescott)}$ FSB: 533MT/s | Intel 852GME | 2GB $^{(2xDDR-333SO-DIMM)}$ | NVIDIA GeForce FX Go5200 $^{(64or128MB)}$ or Intel Extreme Graphics 2 $^{(64MB)shared}$ | One 2.5" IDE | Broadcom BCM5901 or Broadcom BCM5705M Conexant 56K Modem $^{inCDCslot}$ Optional 802.11b or g WLAN $^{inmPCIslot}$ | CCFL backlit XGA(1024x768) 14" or 15" or SXGA+(1400x1050) 15" TN TFT LCD | M(12) | One 3.5" 1.44MB Floppy drive $^{(Unremovable)}$ One Slimline Optical drive bay $^{(Unremovable)}$ ThinkPad ComfortSlant keyboard |
| G50 | Jul 2006 | 329mm x 282.5mm x 50.9mm (12.9" x 11.1" x 2.0") | 3.3 kg (7.3 lb) | Intel Celeron M or Core Duo $^{(Yonah)}$ FSB: 533 or 667MT/s | Intel 945GM | 3GB $^{(2xDDR2-667SO-DIMM)}$ | Intel Graphics Media Accelerator 950 $^{(128MB)shared}$ | One 2.5" IDE | Broadcom BCM5751M Conexant 56K Modem $^{inCDCslot}$ Optional 802.11g WLAN $^{inmPCIslot}$ | CCFL backlit XGA(1024x768) or SXGA+(1400x1050) 15" TN TFT LCD | M(12) | One 3.5" 1.44MB Floppy drive $^{(Unremovable)}$ One Slimline Optical drive bay $^{(Unremovable)}$ ThinkPad ComfortSlant keyboard |
| Notes | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used | ↑ When system memory is 128MB or less, only up to 32MB will be used |