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ThinkPad T20 series

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Series of laptops by IBM

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ThinkPad T20 series

IBM ThinkPad T20, the first of the series


Manufacturer	IBM
Introduced	May 2000
Discontinued	July 2003
Processor	Intel Pentium III
Frequency	650 MHz – 1.20 GHz
Memory	64–256 MBSDRAM (PC100 on T20/T21/T22,PC133 on T23)
Ports	Serial,Parallel,VGA out,USB, PS/2 Port, Ethernet, RJ11 (Modem), IBM docking port,CardBus, S-Video Out, Line-In/Line-Out/Microphone

TheIBMThinkPad T20 series was a series ofnotebook computers introduced in May 2000 byIBM as the successor of the 770 series and the first model of the T-series which exists today underLenovo ownership. Four models were produced, the T20, T21, T22, and T23;^[1] the series was succeeded in May 2002 by the ThinkPad T30, but was produced until July 2003.

Features

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The T20 series succeeded the600 series, adding new features such as S-Video output, an Ethernet port, and the UltraBay 2000 hot-swappable bay. The graphics card was upgraded from the 4 MB NeoMagic 256ZX which was used in the 600X, to an 8 MBS3 Savage (16 MB on T23 models) which was capable of rendering 3D graphics in hardware. The ThinkPad T23 was also the first ThinkPad laptop model to offer an optionalWi-Fi connection via amini-PCI card, using wireless antennas which were built into the lid on select upper-end models.The T20 series originally shipped with eitherWindows 98,Windows 2000, orLinux, with later T23 models shipping withWindows XP. All T20 models were capable of runningWindows 3.x,Windows 95,Windows NT 4.0,OS/2 Warp 4, orWindows Me as well as various Linux distributions. Additionally, the T23 was capable of runningWindows Vista orWindows 7, if equipped with at least 512 MB of memory.

One common problem of the earlier T20 series was a hardware defect which caused the machine to suddenly stop working and begin blinking the hard drive and power indicators. The machine would not power on. This became known as the “Blink of Death”. In addition, on some T23 models, the rear memory slot could fail, rendering the machine only able to use up to 512 MB of memory, rather than 1 GB. Another common issue with the T23 was that one of the coils, near the CPU, could break off the motherboard due to cold solder joints. This caused multiple issues, including the inability to boot or hard lock-up/freeze.

Models

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ThinkPad T20 — First model shipped, featured aPentium III at 650, 700 or 750 MHz, all withSpeedStep technology. This model shipped with either a 13.3" XGA TFT or 14.1" XGA TFT display, and shipped with an externalfloppy drive, a swappableCD-ROM orDVD-ROM drive, and a choice of a 6 GB, 12 GB, or a 20 GB hard drive. The T20 also had optional Ethernet (consumer installable via mini-PCI on all models), one USB 1.1 port, PC Card Slot, and an S-Video output as standard features, and shipped with 128 MB of RAM (upgradeable to 512 MB using PC100SO-DIMMs)
ThinkPad T21 — Featuring an upgradedPentium III processor at either 750 MHz, 800 MHz, or 850 MHz, the T21 featured either a 13.3" XGA TFT, 14.1" XGA TFT, or a new 14.1" SXGA+ TFT display (exclusive to 850 MHz models). This model shipped with a swappable CD-ROM or DVD-ROM drive, and a choice of a 10 GB, 20 GB or 32 GB hard drive. The T21 features either a mini-PCI modem card or an Ethernet/modem combo card, one USB 1.1 port,PC Card Slot, and 128 MB of RAM standard (upgradeable to 512 MB using PC100 SODIMMs).
ThinkPad T22 — Featuring an upgradedPentium III processor at either 800 MHz, 900 MHz, or 1.00 GHz, the T22 featured either a 13.3" XGA TFT, 14.1" XGA TFT, or 14.1" SXGA+ TFT display as standard. This model shipped a mini-PCI modem card or an Ethernet/modem combo card, one USB 1.1 port, PC Card Slot, a swappable CD-ROM or DVD-ROM drive, either a 10 GB, 20 GB or 32 GB hard drive, and 128 MB or 256 MB of RAM standard (upgradeable to 512 MB using PC100 SODIMMs).
ThinkPad T23 — The final model of the T20 series, featuring the newTualatin Pentium III-M at either 866 MHz, 1.00 GHz, 1.13 GHz, or 1.20 GHz (all withSpeedStep technology) and either a 13.3" XGA TFT, 14.1" XGA TFT, or 14.1" SXGA+ TFT display as standard. This model shipped with 2× USB 1.1 ports rather than only one, a 15 GB to 60 GB hard drive, aMini-PCI Modem or Wireless card (on select models), a CD-ROM, DVD-ROM, CD-RW or combo (CD-RW/DVD) drive, and either 128 MB or 256 MB of RAM standard (upgradeable to 1 GB using PC133 SODIMMs).

Comparison

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For all model versions/specifications:https://psref.lenovo.com/syspool/Sys/PDF/withdrawnbook/tawbook.pdf
Model	Intro- duction Date	With- drawal Date	Base Price	Screen Options TFT	CPU Options	Memory (std - max)	Video Controller	Audio Controller	Hard Drive Options				Misc Info
T20	May 2000	?	?	13.3" XGA 1024×768 14.1" XGA 1024×768	IntelPentium III - 650, 700, or 750MHz with SpeedStep Technology, 100 MHz Bus 256 KBcache	128 - 512 MB @ 100 MHz SDRAM	Via S3 Savage IX8 8 MBSGRAM AGP 2x	Cirrus CS4264 CS4297A	6 GB	12 GB	18 GB	20 GB	Ultrabay 2000 ThinkLight UltraPort 56K Modem Li-Ion Battery (4 hr)
T21	Oct 2000	?	?	13.3" XGA 1024×768 14.1" XGA 1024×768 14.1" SXGA+ 1400×1050	IntelPentium III - 750, 800, or 850MHz with SpeedStep Technology, 100 MHz Bus 256 KBcache		Via S3 Savage IX8 or IX8+ 8 MBSGRAM AGP 2x		10 GB	20 GB		32 GB
T22	Mar 2001	?	?	13.3" XGA 1024×768 14.1" XGA 1024×768 14.1" SXGA+ 1400×1050	IntelPentium III - 800 or 900MHz, or 1 GHz with SpeedStep Technology 100 MHz Bus 256 KBcache		Via S3 Savage IX8+ 8 MBSGRAM AGP 2x		15 GB	30 GB		32 GB
T22 (SB)	Mar 2001	?	?	14.1" XGA 1024×768 14.1" SXGA+ 1400×1050	IntelPentium III - 900MHz or 1 GHz with SpeedStep Technology, 100 MHz Bus 256 KBcache		Via S3 Savage IX8+ 8 MBSGRAM AGP 2x		15 GB	30 GB	32 GB	48 GB
T23	Jul 2001	?	?	13.3" XGA 1024×768 14.1" XGA 1024×768 14.1" SXGA+ 1400×1050	IntelPentium III - 866MHz or 1.13 GHz with SpeedStep Technology, 133 MHz Bus 512 KBcache	128 MB - 1 GB @ 133 MHz SDRAM	Via S3 Super Savage IXC16 16 MBSGRAM AGP 4x	Cirrus CS4299	15 GB	30 GB		48 GB	Ultrabay 2000 ThinkLight UltraPort 56K Modem 802.11b Modem Li-Ion Battery
T23 (Fall)	Oct 2001	?	?	14.1" XGA 1024×768 14.1" SXGA+ 1400×1050	IntelPentium III - 1.0, 1.13 or 1.2 GHz with SpeedStep Technology, 133 MHz Bus 512 KBcache	128 MB - 1 GB @ 133 MHz SDRAM			30 GB	40 GB		48 GB	Ultrabay Plus ThinkLight UltraPort 56K Modem WLAN Li-Ion Battery
T23 (Ed)	Apr 2002	?	?	14.1" XGA 1024×768	IntelPentium III - 1.0 GHz with SpeedStep Technology 133 MHz Bus 512 KBcache	256 MB - 1 GB @ 133 MHz SDRAM			20 GB	40 GB		80 GB	Ultrabay Plus ThinkLight UltraPort WLAN Li-Ion Battery
T23 (02)	Jun 2002	?	?	14.1" XGA 1024×768	IntelPentium III - 1.0, 1.13 or 1.2 GHz with SpeedStep Technology 133 MHz Bus 512 KBcache	256 MB - 1 GB @ 133 MHz SDRAM			20 GB	30 GB	40 GB	80 GB	Ultrabay Plus ThinkLight 56K Modem WLAN Li-Ion Battery

References

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^IBM ThinkPad - Withdrawn, Lenovo

ThinkPad T series

Preceded by

IBM ThinkPad 770

IBM ThinkPad T20 series
May 2000-July 2003

Succeeded by

IBM ThinkPad T30

Personal computers byIBM

Desktop
and all-in-one

Single models

Series

pre-PS/2	5550 Industrial Computer
PS/2 (list of models)	25 25 286 25 SX 30 30 286 35 SX 35 LS 35 SLC 40 SX 40 SLC 50 50 Z 53 486SLC2 53 LS 55 SX 55 LS 56 SX 56 LS 56 SLC 56 SLC LS 56 486SLC2 56 486SLC3 56 486SLC3 LS 57 SX 57 SLC 57 SLC2 57 SLC3 Ultimedia M57 SLC Ultimedia M57 486SLC2 60 65 SX 70 386 70 486 76 77 80 E PS/55 PS/V
post-PS/2	PS/1 EduQuest ValuePoint Ambra PC Series Aptiva NetVista ThinkCentre A series M series

Portable

Laptop

pre-ThinkPad

ThinkPad

2xx series	220 230 235 240
3xx series	300 310 350 360 365 380 390
5xx series	500 550BJ 555BJ 560 570
6xx series	600
7xx series	700 701 "Butterfly" 750 755 760 765 770
Power Series	800 820 821 822 823 850 851 860

G series	G40 G41 G50
T series	T20 T21 T22 T23 T30 T40 T41 T42 T43 T60 T61
A series	A20m A21m A22m A22e A20p A21p A22p A30 A31 A30p A31p
X series	X20 X21 X22 X23 X24 X30 X31 X32 X40 X41 X60 X60t X61t
R series	R30 R31 R32 R40 R50 R51 R52 R60 R61
Others	TransNote