At the time I purchased my HDD, I wasn't going to be able to upgrade my mobo yet. This older motherboard that I'm using only has SATA II. After some reasearch, I saw that a SATA III HDD should work on a mobo with SATA II ports, just at the slower SATA II speed. So I went ahead and bought a SATA III HDD in hopes that I would be upgrading soon to a mobo with SATA III ports.
My HDD worked fine for a while. About a month after installing the HDD, I got a BSOD and didn't think much of it. But now, a few months later, the HDD light is staying on almost constantly and it's clicking every few seconds. Also, I'm getting a Windows error every time I start my computer that says my HDD is reporting errors (or something like that) and to back it up soon and still the occasional BSOD. I've had problems like this with HDDs before, but never with a brand new one in such a clean and cooled system.
Could connecting a SATA III HDD into a SATA II port cause disk failure and BSODs like this? Or, is there something else at work here, like simply a poor quality HDD? My case is clean, vented and cooled better than any other computer I've ever had. The HDD has a 120mm fan blowing directly on it. Also, I have plenty of power (750w). The only other thing that has been acting strange is my CPU, which is on its last leg as well (overheating/terrible usage spikes). I'm about to upgrade almost all of my components, but I need my computer for school until then. I'm just wondering what would be the likely culprit of my HDDs death. My HDD is a 1TB Toshiba, by the way.