hi have a old p4 with only 2 sata ports on my board.whitch i use for my dvd writer and a 1tb hard drive. i got a new 500gb hardrive and had to get a pci sata card.whwn i access my drive on the sata card i noticed my cpu usage gets high and my mouse stutters across the screen.i tried changing drivers but does not help. all my drives are samsung. thanks justin south africa
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let me guess, cheap PCI sata card? and your computer is how old? what processor, ram, OS etc...