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Lenovo ThinkStation D20 4155K4U Tower Workstation - 2 x Processors Supported - 1 x Intel Xeon X5650 Hexa-core (6 Core) 2.66 GHz - 4 GB RAM - DDR3 SDRAM - 6 x Memory Slots - 500 GB HDD - DVD-Writer - 1 x NVIDIA Quadro 600 1 GB Graphics - Windows 7 Professional 64-bit - 0, 1, 5, 10 RAID Levels - DisplayPort - DVI - 10 x Total USB Ports - 10 x USB 2.0 Ports - 1.06 kW

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All orders are self-checkout. Phone orders are not accepted. All prices are firm and non-negotiable. We accept Visa/Mastercard only. All orders M-F before 3pm EST usually ship same day once final credit card authorization is completed. Our 7 warehouses ship via UPS/Purolator only. No pick-ups. Order inquiries can be made by calling 1-800-556-1971.

Ships from our international warehouse. Please allow 3-5 weeks for delivery.

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Part #: 4155K4U

Price: $2,612.99

  • 3 Year Warranty
  • 15 LBS.
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Reliable and secure.

Rigorous voltage, shock, vibration, and drop tests ensure that your Lenovo workstation is equipped with the rock-solid durability Think-branded products are renowned for. Plus our ThinkVantage Technologies automate updates and maintenance tasks, protect your business critical information, and prevent unauthorized access to data.

Our Rescue and Recovery helps you recover from system crashes with the push of a button, even if the primary operating system won't boot. And with Client Security Solution, you simply can't get a higher level of security as a standard PC feature from any other manufacturer.

General Information
Manufacturer:Lenovo Group Limited
Manufacturer Part Number:4155K4U
Manufacturer Website Address:
Brand Name:Lenovo
Product Line:ThinkStation
Product Series:D20
Product Model:4155K4U
Product Name:ThinkStation D20 4155K4U Workstation
Product Type:Workstation
Processor & Chipset
Number of Processors Supported:2
Number of Processors Installed:1
Processor Manufacturer:Intel
Processor Type:Xeon
Processor Model:X5650
Processor Core:Hexa-core (6 Core)
Processor Speed:2.66 GHz
Cache:12 MB
QuickPath Interconnect:6.40 GT/s
64-bit Processing:Yes
Chipset Manufacturer:Intel
Chipset Model:5520
Standard Memory:4 GB
Memory Technology:DDR3 SDRAM
Memory Standard:DDR3-1333/PC3-10600
Number of Total Memory Slots:6
Memory Card Reader:Yes
Number of Hard Drives:1
Total Hard Drive Capacity:500 GB
Hard Drive Interface:Serial ATA/300
Hard Drive RPM:7200
Hard Drive Configuration:1 x 500 GB
Optical Drive Type:DVD-Writer
Optical Media Supported:DVD-RAM/±R/±RW
Dual-Layer Media Supported:Yes
Controller Type:Serial ATA/300
RAID Supported:Yes
RAID Levels:0, 1, 5, 10
Display & Graphics
Number of Graphic Controllers:1
Graphics Controller Manufacturer:NVIDIA
Graphics Controller Model:Quadro 600
Graphics Memory Capacity:1 GB
Graphics Controller Interface:PCI Express x16
I/O Expansions
Number of Total Expansion Bays:9
Number of External 5.25" Bays:3
Number of 3.5" Bays:6
Number of Total Expansion Slots:6
Number of PCI Slots:2
Number of PCI Express x1 Slots:1
Number of PCI Express x16 Slots:3
Network & Communication
Ethernet Technology:Gigabit Ethernet
Total Number of USB Ports:10
Number of USB 2.0 Ports:10
Network (RJ-45):Yes
Audio Line In:Yes
Audio Line Out:Yes
Input Devices
Pointing Device Type:Mouse
Operating System Platform:Windows
Operating System:Windows 7 Professional
Operating System Architecture:64-bit
Software Included:
  • Rescue and Recovery
  • ThinkVantage System Update
  • ThinkVantage Toolbox
  • Norton Internet Security (30 days of virus definitions)
  • Adobe Reader
  • Adobe Flash Player
  • Microsoft Office 2010 with Product Key Ready (O10PKR)
  • Roxio Creator Business Edition
  • Roxio MyDVD
  • Corel WinDVD
Power Description
Maximum Power Supply Wattage:1.06 kW
Package Contents:
  • ThinkStation D20 4155K4U Workstation
  • Keyboard
  • Mouse
Environmentally Friendly:Yes
Environmental Certification:GREENGUARD, RoHS, EPEAT Gold, 80 Plus Bronze
Physical Characteristics
Color:Raven Black
Form Factor:Tower
Height:19.1" (485.1 mm)
Width:8.3" (210.8 mm)
Depth:23.7" (602 mm)
Weight (Approximate):27.22 kg
Limited Warranty:3 Year

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