Hi, i ll really appreciate ur help, coz i have really tried everything. I bought a Samsung SP1614N 160 GB Hdd. I have a Syntax SV266a mother board. My computer only recognize my hdd in PIO mode, which is very strange coz i have all other devices like other Hdd and DVD rom are running in UMDA mode. My system operates very slow coz of PIO mode of my new Hdd. I tried to change PIO to UDMA from bios but options there only lets me either disable DMA mode or make it auto. I have tried to unstall IDE channel and even Via master bus controller coz someone suggested that when i restart my computer everything would be reinstalled itself and the problems would be corrected as well but nothing changes. My hdds are conneted through separate cables. I have reinstalled the latest motherboard drivers, did hdd test suggested by manufacturers. The test states that UMDA-133 is functioning properly but nothing changes. I have tried everything, even bought another cable which supports UDMA, but nothing seems to work. I use windows XP professional edition. I really dont know what to do. I have tried everything. Pls help.