weird noise from my AMD Radeon HD 5670 1G DDR5

hello. i was gonna ask some stuff about my video card

  mole1944 05:54 20 Nov 13

And

omg, why my message got cut :(

ok ill write it again (>_<)

I bought my PC like a year and half ago, shes doin well and good at gaming, such as online games with hi graphics and PC games. this is my specs

OS: windows 7 home premium 64-bit board : ECS H61H2 - M2 Processor : i3-2100 3.10ghz Ram: Ripsjaw 4G (2g each) video card: AMD Radeon 5670 1G ddr5

Suddenly last month I notice that shes makin a weird sound like once a day, like a squealing sound (like a pig or whatsoever they call it). First i ignore it. and lately this past weeks. It became more noisy like every 15-20 minutes it makes that weird sound:

*when i open my PC it starts the weird noise (im not playing a game) *when im encoding at MS office (no other application open only MS office and youtube) *when im sleeping and downloading movies (only utorrent is open)

i got worried about it, i dont use my pC much that now, this past 5 months, because im busy at daily healthy life. I use it only at checking mails now and surfing at net. Not unlike before for gaming stuffs. So i got worried and try to ask here at the forum about this stuff.

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