IBM ThinkPad R Series notebooks offer mainstream performance and features for frequently mobile users who want easy, ready-to-run computing. These affordable notebooks offer lightweight designs with great performance, outstanding battery life on select models and large, bright displays. The ThinkPad R51 mobile workstation provides high-performance graphics for displaying detailed designs, dramatic demos and high-powered presentations. The ThinkPad family also features exclusive IBM ThinkVantage Technologies and ThinkVantage design. Together, they deliver business advantage by helping to save time and money and enabling you to focus on your business - not your technology.

Specifications

Key Features
Processor  Pentium M 1.7 GHz 
Installed Memory  256 MB (DDR SDRAM) 
Hard Drive  40 GB Ultra ATA 100, 4200 RPM 
Display  15 in. XGA TFT LCD 
Operating System  Microsoft Windows XP Professional 
Mobile Technology  Intel Centrino Mobile Technology 

Processor
Processor Type  Pentium M 
Processor Manufacturer  Intel 
Processor Speed  1.7 GHz 

Motherboard
Bus Speed  400 MHz 

Memory
Installed RAM  256 MB 
RAM Technology  DDR SDRAM 
Max Supported RAM  2.048 GB 
RAM Speed  333 MHz 
Installed Cache Memory  2048 KB 

Hard Drive
Hard Drive Capacity  40 GB 
Hard Drive Rotation Speed  4200 RPM 
Storage Controller Type  Ultra ATA 100 

CD / DVD
CD / DVD Type  CD-RW/DVD-ROM 
Optical Drive Read Speed  24x (CD) • 8x (DVD) 
Optical Drive Write Speed  24x (CD)   
Optical Drive ReWrite Speed  24x (CD-RW) 

Display
Display Tech  XGA TFT LCD 
Display Size  15 in. 
Display Color Support  24-bit (16.7 million colors) 
Display Max. Resolution  1024 x 768 

Video
Graphic Processor  Intel Extreme Graphics 2 
Graphic Bus Interface  AGP x4 
External Video Resolution  2048 x 1536 

Audio
Audio Output Type  Headphones • Sound card • Speaker(s) 
Audio Input Type  Line In (3.5mm) • Microphone 

Operating System
Operating System  Microsoft Windows XP Professional 
Recommended Use  Corporate Business, Small Business   
Platform  PC 

Technical Features
Expandability  Docking Station/Port Replicator, 1 x Type III PC Card Slot 
Expansion Ports  2 x USB 2.0, 1 x IEEE 1394a (FireWire), VGA out, Parallel Port, RJ-11 (modem), RJ-45 (NIC), S-Video out 
Security Features  HDD Password, Power-On Password, IBM Embedded Security Subsystem 2.0, Administrator Password, IBM Security Slot 
Input Method  Keyboard • Ultranav 

Networking
Networking Type  Integrated 10/100/1000 Network Card • Infrared Port • Integrated Wireless LAN 
Data Link Protocol  Ethernet • Fast Ethernet • Gigabit Ethernet • IEEE 802.11b • IEEE 802.11g 

Modem
Modem Type  Fax / Modem 
Analog Modulation Protocol  ITU V.92 

Battery
Battery Run Time  4 Hour(s). 
Battery Technology  Lithium ion 

Dimensions
Width  13.1 in. 
Depth  10.6 in. 
Height  1.58 in. 
Weight  6.6 lb. 

Warranty
Warranty  3 Years 
World Wide Warranty  Yes, Limited 

Review

Pros: Sturdy, quality, unique features, 3-year warranty
Cons: Audio speakers are not that great
Bottom Line: For a lasting product, buy a IBM.

Source:
http://www.dealtime.com