Just talked with Oskar couple minutes ago.

when you play winbond utt type of ram on DFI NF4 series, and if you set the jp17 on 2-3, after your play is done. PLEASE, do as followed:

Clear CMOS before set the jp17 back to default 1-2 position or set the 3.2v before set the jp17 back to 1-2. Several of my friends already killed their ram already. Be very careful about this.

and be sure look at when you set 2.6v and see if voltage monitor under the bios is showing exactly what you set.