Detailed specifications - ThinkCentre A55 (type 8705, 8975, 8985, 9265) / M55e (type 9279, 9379, 9389, 9637)
ArchitectureSecurity
CommunicationsSoftware
ExpansionStorage
PowerVideo

Architecture
System board / Form factor
  • Tower (3x4) with Intel 946GZ chipset
  • Intel Celeron® and Pentium® processors with integrated L2 cache
  • Supports I/O bus speeds of 533MHz, 800MHZ FSB supported
  • uATX system board design
Processor
  • Intel® Celeron® D Processor 331
  • Intel® Celeron® D Processor 336
  • Intel® Pentium® 4 Processor 524 with HT Technology
  • Intel® Pentium® 4 Processor 531 with HT Technology
  • Intel® Pentium® 4 Processor 541 with HT Technology
  • Intel® Pentium® 4 Processor 620 with HT Technology
  • Intel® Pentium® 4 Processor 630 with HT Technology
  • Intel® Pentium® 4 Processor 641 with HT Technology
  • Intel® Pentium® D Processor 820
  • Intel® Pentium® D Processor 925
  • Intel® Pentium® D Processor 945
Cache
  • 256KB/ 512KB cache - Celeron processors
  • 1MB/ 2MB cache - Pentium 4 Processors
  • 2 x 1MB cache - Pentium D processors
  • 2 x 2MB cache - Pentium D processors
Chipsets
  • Intel 946GZ
  • AC '97 2.3 Digital controller
IDE controller
  • 1 Serial ATA connector (The serial port supports data transfer at speeds up to 115.2 Kbits/sec)
  • 1 Parallel connector (The parallel port supports Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) operations)
  • IEEE 1284 (enhanced parallel port)
  • IEEE 1294 (parallel port)
Memory
  • 533MHz/ 667MHz DDR2 (Double Data Rate) dual channel memory support
  • PC2-4200 and PC2-5300 memory supported
  • Two 184 pin DDR1 SDRAM UDIMM sockets
  • Support for up to 4 GB of DDR2 SDRAM (for selected systems only)
  • ECC or parity memory is not supported
Audio
  • Standard audio onboard
Keyboard and mouse
  • Preferred Pro full-size keyboard
  • USB Optical Wheel mouse

Communications
Networking
  • Integrated Broadcom Gigabit Ethernet

Expansion
Bays
  • One 3.5-inch slim external accessible bay (floppy diskette drive)
  • One 3.5-inch slim internal hidden bay (hard drive)
  • Two 5.25-inch external half-high bays (optical drives)
External ports
  • Six USB 2.0 ports — two front, four rear for easy connection of peripherals
  • One ethernet RJ-45
  • Two 9-pin serial ports (2nd serial port via cable)
  • One 25-pin parallel port
  • Mouse, keyboard, and VGA monitor ports
  • Line-out, line-in, microphone audio jack-in, and headphone-out ports
Slots
  • One full-length, full-height, PCI Express x1
  • Two full-length, full-height, 32-bit PCI 2.3 (5v)

Power
Power management
  • Advanced Configuration and Power Interface (ACPI) support
  • ACPI v2.3
Power supply
  • 230-Watt supply with variable speed fan

    Note: Power consumption and heat output vary depending on the number and type of optional features installed and the power-management optional features in use.

Security
  • Padlock loop (in rear for optional padlock)
  • Security slot (in rear for optional Kensington Microsaver cable)
  • No keylock
  • Power-on password
  • Administrator password
  • Hard drive password (user and master)
  • Boot sequence control
  • Boot without keyboard, mouse, diskette
  • USB/ethernet/serial/parallel/SATA/EIDE/diskette enable or disable
  • Disk, removable, and network device password
  • Diskette write protect
  • Front USB port disablement
  • Symantec Client Security

Software
Operating system

Note: Preloaded software utilizes the disk-to-disk recovery method. Select models ship without the Operating system.


Storage
Optical drive
  • 48x CD-ROM (selected models)
  • 16x DVD-ROM (selected models)
  • 48x32x48x16x CD-RW/DVD combo drive
  • Multi-Burner Plus 16x
Hard drive features
  • 7200RPM Serial ATA supported

Video
ATI Radeon X300SE 128MB PCIe
  • PCI Express x16
  • 1 x VGA - 15 pin HD D-Sub (HD-15)
  • OpenGL, DirectX 9.0
  • TV out
  • S-Video, composite video
  • 1 x S-video output
  • 1 x composite video output - RCA ( with adapter )
Resolution, maximum color depth, and refresh rates
  • 640 x 480, 16M color (200 Hz)
  • 800 x 600, 16M color (200 Hz)
  • 1024 x 768, 16M colors (200 Hz)
  • 1152 x 864, 16M colors (200 Hz)
  • 1280 x 1024, 16M colors (160 Hz)
  • 1600 x 1200, 16M colors (120 Hz)
  • 1920 x 1080, 16M colors (120 Hz)
  • 1920 x 1200, 16M colors (100 Hz)
  • 1920 x 1440, 16M colors (90 Hz)
  • 2048 x 1536, 16M colors (85 Hz)


If you are unable to find what you are looking for, please do try the following options:
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2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
AvailableWorldwide
Document ID : PD010401
Legacy Document ID : MIGR-65975
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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