Why is my gfx card is beeping while playing Assassin's Creed?

My pc beeps while i play "Assassin's Creed".
I think it's my gigabyte 9800gtx+ that beeps as these beeps sound scratchy, unlike the mother board beeps.
I have a 500W PSU(80% efficiency) and i'm maxed out on coolers; 1 on CPU(with a plastic tunnel that funels the hot air out), 1 on the gfx card, 2 on the case(in\out), 2 on the PSU(in\out).

why is my gfx card is beeping while playing Assassin's Creed?

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<b>Model Name</b> : GA-EP45C-UD3R(rev. 1.0)
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<b>M/B Rev</b> : 1.0
<b>BIOS Ver</b> : ??
<b>Serial No.</b> :
<b>Purchase Dealer</b> : K.S.P. ltd.
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<b>VGA Brand</b> : GIGABYTE <b>Model</b> : gtx9800+ 1gb
<b>CPU Brand</b> : Intel <b>Model</b> : Q9400 <b>Speed</b> : 2.66
<b>Operation System</b> : Win XP <b>SP</b> : 2
<b>Memory Brand</b> : OCZ <b>Type</b> : DDRII
<b>Memory Size</b> : 4GB <b>Speed</b> : 1066
<b>Power Supply</b> : 500 W

thx, but that wasn't it.

I had bad ram chips on the mobo, and i had to revert to the cd basic drivers.

i fixed them both and the game runs on the highest settings.

my advice to how ever read this, fall back to previous driver pack.
sometimes Nvidia messes up with the drivers...

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