Question Monitor goes black at overcloaking

My monitor turns off if i overclock my r5 1600x to 4,2 Ghz at 1,378v.
Any idea what is causing it?
Overclocking is causing it???

4.2Ghz sounds like a whole lot for any 1st gen (1800x's aside) as they generally peaked at about 4.0, 4.1 if really good silicon . Try more volts... like 1.425 or even up to 1.45 if you have really good cooling for it. But in general, you might find it cooler and more stable in the 3.9-4.0Ghz range at about 1.375 V.

Speaking of: what are the system spec's? especially motherboard, cooler, PSU ?
 
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Overclocking is causing it???

4.2Ghz sounds like a whole lot for any 1st gen (1800x's aside) as they generally peaked at about 4.0, 4.1 if really good silicon . Try more volts... like 1.425 or even up to 1.45 if you have really good cooling for it. But in general, you might find it cooler and more stable in the 3.9-4.0Ghz range at about 1.375 V.

Speaking of: what are the system spec's? especially motherboard, cooler, PSU ?
Corsair rm650, AORUS B450 PRO, nzxt kraken x42 v2.