Hi guys: I have a Asus P5G41T-M LX motherboard. In JumperFree Configuration menu of BIOS Setup, when I set [AI Overclocking] item to [Overclock Profile], appears [Overclock Options] item, whose configuration options are: [Overclock 5%] [Overclock 10%], [overclock 15%] [overclock 20%], [Test Mode]. What is [Test Mode]? When should I use it? Thanks.