I don't know what would be the TDP at that speed and voltage, I'm monitoring only the total power consumption of the PC.

Seems I didn't get the best sample, I'm getting errors at 2875Mhz (12.5 x 230Mhz) at stock voltage, 2750Mhz went fine but not here. Have to do more checks but I already lowered the HT Link speed and still get the same errors, I'll try cooling actively the CPU, it might help a little bit.....