Random Computer Freezes

[Skids]

I've just bought a new hdd, installed it, made some partitions, etc. After 2-3h of using the computer, my windows started to random freeze. It got to the point where i couldnt do anything and i had to reset it. Well after reset, it gets stuck while detecting the hdd. After swithing the slots around, i got the same problem. Also i changed my old hdd that worked perfectly, and i have the similar problem. My question is what could be wrong here? is it a hdd problem? a mobo ? could really use some help.

Cheers.

[OhpUldum]

Read this then repost.

To start you want to make sure the hard drive is being seen by the motherboard through the BIOS.

[Skids]

it`s seen sometimes, sometimes it doesn`t appear

[Sno]

it`s seen sometimes, sometimes it doesn`t appear

Checked the back of it for loose cables?

[Skids]

yes ...dunno what to do else...tried almost everything

---------- Post added 2011-08-25 at 06:57 AM ----------

well the problem is that I dont know whats the problem exactly, since my mobo is still in warranty i could easily change it, but im not sure that is the main problem here.