Can someone explain me this how is my cpu boosting over 4.5ghz not overclocked or anything just everything stock wity only infinity fabric set to 1600
It's the automatic turbo function integrated into the CPU and motherboard, and is normal.
3700X is only a 4.4 Boost... so this is odd
Not necessarily. Remember that AGESA 184.108.40.206ABBA which fixed the issue of Ryzen processors not hitting their target boost clocks actually enabled Ryzen 3000 series processors to boost beyond that assuming the conditions were right, which was documented in reviews. I see that that graphic shows his maximum CPU temperature was 61*C and peaked at the heart attack inducing 1.494v, so it's either an erroneous reading across the board, or his motherboard is allowing it to boost that high.
Retrieving data ...