I have gigabyte combo mobo. i am using it since 1 year. the Mobo have 4 sata ports, 4 sata ports not working like new mobo. I have 2 ports working well. I have 2 hard drive & Sata DVD Writer. I con't use 3 port at a time, DVD writer Ditected but its not Writing DVDs, I replace same port with HDD. HDD working slow copy speed 3mb/s. i check sata cabals its working good.