Hi to all, I'm new! Starting knowing that I'm italian and I didn't have a very good english i want to ask yours for support with my problem. Here's the problem: Today (after 2 years of owning my video card), I've bought a little upgrade for my system: Western Digital 1TB WD1002FAEX 7200rpm 64MB Black SCYTHE Mugen 2 Rev.B AM3/AM2+/754/939/478/775/1366/1156 Arctic Cooling Accelero Twin Turbo Pro I've installed everything, and when in point to test the new performances i've noticed a annoying problem: every time i run a game or a 3D render the speakers emit an noise that change in intensity with the framerate. I know that the Video Card normaly emit similiar sound (specialy at high fps), but this sound normaly didn't travel to speakers! I've tried to: Test external sound card (logitech g35) -> no noise Test another speaker system -> noise Flash different bios downclock gpu So i guess that the GPU interferes with analog connector, and i hope that isn't motherboard the problem. Tomorrow i will disassemble the entire system and reassembly, even i've mounted bad something and short circuited something (i had to disassemble the entire system to install the mugen!) Here's my system config: CASE: Haf 932 CPU: AMD Phenom II X4 965 BE MOBO: Gigabyte AM3 GA-790FXTA-UD5 GPU: Ati Sapphire HD4850 Dual Slot Heatsink 512MB GDDR3 RAM: G.Skill Ripjaws 4GB CL7 1600Mhz PSU: CoolerMaster Silent Pro M600 MONITOR: Asus VW222U Apologies for my terrifing english!