memory - Does Lenovo T400 can only work with up to 4GB RAM?

Does Lenovo T400 only work with up to 4GB RAM?

On the detailed specifications for the Lenovo T400, it says "512 MB, 1 GB, 2GB, or 4GB memory" and "Supports up to 4GB maximum memory". Is it for the total memory, or the size of each RAM chip?

So if there is more than 4GB RAM in the computer, will it do harm to the hardware of the T400? Or will only 4GB will be used, without any other side-effects?

Updated:
Some people claim that their T400 can use about 8GB RAM under WIndows 7:

So will that potentially break the laptop?

Answer

The 4GB are the maximum size of 1 RAM module. You have 2 RAM slots, the Intel GM45 Express chipset supports 8GB, so you can use 2 * 4GB = 8GB RAM.