I just found out that apparently I can't change the voltage on my card (Trixx shows the changes, but GPU-Z and CGMiner both show the stock voltage). Along with this, I can't change the memory clock speed (Trixx again shows what I set it to, but CGMiner and GPU-Z show different).
That sucks,
.Many cards are voltage locked, many aren't. Try again using MSI afterburner with unofficial overclock mode turned on. If that fails, see if you can flash your card's bios to another with a lower voltage setting.
Furthermore, cgminer always shows incorrect GPU voltages for my card. It will show 1.25v even when I'm running at 1.0v