I just wasted a nice amount on buying a rig of 4GB ram installed. I forgot to check whether it will be used by XP or not. Now it cannot return the same also. I checked many articles about that 4GB usb switch. But nothing was found. I just founded a link on web that talk about 4 GB RAM Tuning feature. I am not able to understand much of this. Also I am doubtful about using the options that are provided in the same. Hope some geek can read and post a much easy solution.
A description of the 4 GB RAM Tuning feature and the Physical Address Extension parameter