Hi,\n\nI had a strange problem with my new GA-7N400 mb the other week.\nWhen I had installed the system I was not able to install windows on\nmy new SATA disk. I went into the BIOS and disabled the SATA RAID\nfunction. However, when I had done this the PC would halt halfway\nthrough the boot at the BIOS page where the SATA harddisk detection\noccured. My new Samsung 160GB disk was not detected and the BIOS would\nnot pass this stage.\nI took the motherboard and disk to the shop where I had just bought it\nand there, bare on the test bench, it would start without any\nproblems.\nPuzzled I returned home and rebuilt the system, but this time with\nonly the basic devices connected. To my amazement it started again.\nHowever, when I attached all devices the mb got stuck at the boot just\nlike before.\nAfter some detective work I found that the problem occured when I\nattached the old fan in the case front to the auxilary motherboard fan\nconnector. I verified this a few times and it was certainly the\nproblem.\nThe fan (I think it was a quiet fan from Evermax? with temperature\nsensor speed control) is a good year old, but worked fine in my old\nMSI KT7 mb. With a new fan from Arctic cooling this problem does not\nappear and the mb has worked well since.\n\nHas anyone seen a similar problem and/or can someone explain how this\nhappened.\nWas there a problem with reading the fan speed that stopped the boot\nas a security measure?