I Think these sort of utilities are almost done by chipset, this will work with Gigabyte EP45 boards not sure if there's backward compatibility
It was an earlier version on the x48T certainly didn't have the voltages, think it was more like just the set
FSB kind of thing. Think I installed it then ditched it
Edit:
Was pretty please getting this sorted
Tuning Bios - GTLREF & DRAM Sub Voltages It's pretty damn slick now. Much easier than Look up tables like this
GTL REF & VTT Voltage Settings - X48 LT-UT , having said that , need some more testing to see that they pan out , but so far so good