Lenovo ThinkCentre M55

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Lenovo ThinkCentre M55
Lenovo logo from 2003 to 2015
Lenovo ThinkCentre M55
Lenovo ThinkCentre M55
Product familyThinkCentre
TypeDesktop computer
Release dateSeptember 2006
Introductory price$1,099
Operating systemWindows Vista Ultimate 64-bit, English
CPUIntel Core 2 Duo E6300 @ 1.86 GHz
Memory4 GB (DDR2 800 MHz)
Storage256 GB TEAMGROUP T-Force Vulcan Z SATA SSD
GraphicsIntel Q963 Express Chipset
Connectivity8 USB 2.0, 1 VGA, 2 PS/2, 4 Audio jacks, 1 Serial, 1 Parallel

Lenovo's ThinkCentre line of desktop computers are business-oriented machines. The ThinkCentre M55 came out in September 2006, featuring an Intel Core 2 Duo processor, up to 2 GB of DDR2 memory, and the choice of either Windows XP or Vista.

Collection Specifics

My specific M55 originally came with a Core 2 Duo E6300, 2 GB of memory, and Intel integrated graphics. I bought it for $41 off of eBay on September 17, 2020, and originally used it as a part of my home Windows Server domain network. Eventually, I replaced it with my ThinkCentre M625q in the network and now use this M55 as a personal desktop to experiment with various things.

Operating System

Originally, this computer shipped with Windows XP Professional, though I decided to install Windows Vista Business when I received the device. Eventually, I upgraded it to Windows 7. After I got the M625q, this computer sat dormant for a while until August 5, 2023 when I decided to install Windows Vista Ultimate.


In early August 2023, I upgraded the 2 GB of 667 MHz DDR2 memory to 4 GB of 800 MHz DDR2. I also upgraded the old internal hard drive with a 256 GB TEAMGROUP solid-state drive.