Per Boysen wrote: >It all started when I connected a second hard drive. The motherboard has >two channels and on each channel I put a hard drive as master and a CD >drive as slave. The old setup, whith no problems, was one hard drive on >one channel and the two CD drives on the other. If someone has >experience with these kind of MOBO slot problems I would appreciate some >hints. Paisting in system specs below. Hi Per I would suggest that you connect the two HDD's to your primary IDE channel, and the two CD drives to the secondary. (Needless to say, set them to master and slave.) FYI, my setup is a P4 Northwood 2,53, 1 Gig DDR RAM, MSI 845 Mobo, matrox G450, Hammerfall, Unitor 8 mk 2, Win XP, 3 IBM ATA 100 drives - master channel 1 OS and programmes, slave channel 1 audio, master channel 2 samples. My CD ROM and Writer are SCSI, on a PCI card. Works great. HTH kind regards Mark Cahill