The ThinkCentre 256MB or 512MB PC2-6400 DDR2-800 SDRAM UDIMM Memory offers:

• Memory capacities:
  • 256MB (41U2975)
  • 512MB (41U2976)
• Maximum data transfer rate of up to 6,400 MBps
• 240-pin UDIMM with gold-plated leads
• Serial presence detect and decode functions

Notes:

1. PC2-5300 and PC2-6400 memory can coexist on one system, but will operate at PC2-5300 speed.
2. Data transfer rate may vary based upon many factors and is often less than the maximum possible.

• PC2-6400 DDR2 SDRAM memory upgrades -- The 6400 is a figure derived from twice the memory-side bus clock frequency (400 MHz x 2; data transfers can occur on both edges of the clock) times the module data width (64 bits / 8 bits/byte = 8 bytes) = 6,400. This is the maximum data rate; the units are MBps.
• Column Address Strobe (CAS) Latency (CL) of 6 (memory bus clock cycles) for PC2-6400 memory.
• Non-parity mode organized as 32M x 64, 64M x 64 and 128M x 64 respectively.
• Serial presence detect with Serial EEPROM.
• 240-pin JEDEC/EIA standard UDIMM interface.
• Gold-plated leads.

• Individual/Single Pack Unpackaged Memory (memory module only):
  • Approximate height: 4 mm (0.2 in)
  • Approximate width: 133 mm (5.3 in
  • Approximate depth: 30 mm (1.2 in)
  • Approximate weight: 0.1kg (0.2 lb)
• Individual/Single Pack Packaged Memory (memory module and carton)
  • Approximate height: 28 mm (0.2 in)
  • Approximate width: 180 mm (5.3 in
  • Approximate depth: 65 mm (2.6 in)
  • Approximate weight: 0.15 kg (0.3 lb)

3 year Customer Replacement Unit (CRU) Service

• Announce date: 26 September 2006 (Worldwide)
• Planned availability date: 29 September 2006 (Worldwide)
• Discontinued, withdrawn from marketing:
  • 256GB (41U2975): July 2008
  • 512MB (41U2976): July 2008

The 256MB and 512MB PC2-6400 NP DDR2 SDRAM UDIMM memory upgrades are supported on the following machine types:

• ThinkCentre M55 (type 8793, 8794, 8797, 8798, 8800, 8801, 8802, 8805, 8810, 8811, 8814, 8816)
• ThinkCentre M55p (type 8792, 8794, 8796, 8798, 8800, 8802, 8804, 8806, 8808, 8811)

Note: Some configurations may not be compatible.

• 256MB or 512MB PC2-6400 NP DDR2 SDRAM UDIMM memory
• Publication