Custom Grounding Kit

Been having strange issues with sound interference whenever the gpu ramps up, and I've swapped the motherboard 3 times (first was MSI G77A-GD45 to same, then I upgraded to a GZZA-GD65 and still has the problem). So far nothing has fixed it, my only work around has been using a usb sound card until I get a PCI-E 1X Sound Card. Oh well, never been a fan of onboard quality anyways. :/