The UD3 and UD5 1.0 was really trash mobos since they got massive vdrop.
Well both mine did.
With a sabertooth 2.0 mine did 4.8ghz on 1.55v and 5ghz on 1.64v.
You really need a better cooler, On 5ghz I was hitting 58C on custom water loop. 1.45v really is nothing for a FX chip when factory the higher clocked ones come stock at 1.55v
SLI Voodoo 2 - > GeForce4 MX 420 -> GF 6600GT -> GF 6800GT -> GF 8800Ultra -> AMD 4870 -> AMD 4890 -> CF AMD 5820 -> CF AMD 6850 -> CF AMD 7970 -> SLI GF 680 -> SLI GF 780 -> CF AMD 290X -> GF 980ti -> SLI GF 980ti -> GF 1080ti -> SLI GF 1080ti -> <- RTX 2080ti (DOA/Refunded)