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...( I had to raise CV a lot from stock value and without massive fans CPU and L3 chips are overheating very fast. WC is on it's way :)...

Do you happen to remember what your temperature increase was between 1.5 and 1.58 (if you even took that step)? The reason I ask is because it was much higher on mine than I was expecting. From 1.42 to 1.5 resulted in a two to three degree increase, but 1.5 to 1.58 spiked it about nine degrees higher than that. I wan't expecting such a jump at the same CV. I'm starting to second guess myself and wonder if it was something else. Maybe I didn't have the heatsink screwed down tightly. Any thoughts? Or does this seem normal from your experience?
 
^^^Unfortunately I've omitted 1.58 with this CPU, so I can't tell what temps should be considered "normal" at this freq.
 
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