ThinkPad T400s (2801, 2808, 2809, 2815)

System Information

Manufacturer Specifications:

Memory Sockets: 2 slot(s)
Maximum Memory: Supports up to 8GB
Model Id:

Product Notes:

If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). 64-bit operating system required to support over 4GB.