I do not really recognize my PC, I was under XP with Raid1 2x160Gb in 7200 / min after mounting these discs Raid1 Seven + and keeping all other components identically, my computer works even better than in his first days with the old records and XP. I think it can afford to keep their PC a few times when we have sound hardware basis. Only regret, I would perhaps take the 300Gb.