The R400 comes with Intel Core 2 Duo processor with 2GB of RAM up to 8GB of PC2-8500, 160GB of HDD storage, including a Webcam, a DVD/CD burner, VGA-out, and an Express Card slot. You’ll also find the standard 802.11 Wireless LAN, and Bluetooth connectivity options.
The following drivers and software are compatible with your ThinkPad R400 notebook and compatible with Windows XP
Disabling tool for Intel Turbo Memory
Description :Windows XP/2000 operating systems do not support Intel Turbo Memory. So if you are using Windows XP/2000, there will be a Yellow Exclamation (!) shown in Device Manager. This package is to eliminate the Yellow Exclamation (!) in Device Manager.