Hi, I have one ASUS M2N32 WS Pro with X2-Dualcore and 4GB ECC memory connected to an perc/5i controller (mfi). Its a NVidia chipset so parts of the mem gets remapped above 4GB. All is working file. Bye/2 --- Michael Reifenberger Michael at Reifenberger.com http://www.Reifenberger.com