Hello I was given an AMD Radeon HD3870x2 to play with it for a while. At work on a really cheap nForce 520 mobo the card works fine! Slow but works without problems! On a AMD 780 Mobo everything is fine but on my PC it woun't boot!!!! On an ASUS P5N32E-SLI nForce 680i mobo the card don't want to boot at all! The system beeps as everything is ok but no Picture on the screen! The monitor stays in stand-by mode. I updated the BIOS to the newest one (and lost all overclocking capabilities but this is normal for this mobo) but no change. My 8800GTS 320MB works fine with the system but the 3870X2 don't! 700W Fortron Epsilon is powering the system and I have had no problems till now. Any Ideas?