Cant over clock my evga 1080ti

[T3King]

I'm running a stress test on my evag 1080tisc that I got someday ago. I'm using msi kombustor to stress test gpu. I'm getting small stutters every so often very small tho. The picture I posted is the image on the stress test it goes up and down side to side and it stutter very little. Why is this??? Also another question. Why cant i overclock my GPU when I do it crashes right away is it that my power supplie is to low I'm over clocking the core clock 40 at a time but crashed right away then I overclock the memory clock by 100 and crashes right away

How long should I run the test for????

Specs 

Mobo z370 f 

Cpu i7 8700k

Gpu evga 1080ti sc

Ram 16gb 3200 cl 14

Power sup evga 650 gq

 

 

 

[FrostyRob]

this is probably not the right section for this discussion.  But some cards do not overclock as well as others.  Some, however rarely, don't overclock at all.  Or perhaps the power delivery is not able to sustain the power demand of the overclock but that is very unlikely.  

[Jurrunio]

you shouldn't use Furmark or its derivatives (including Kombustor) anyway, they push the power consumption (But not the core iitself) way to hard so you can't even reach frequencies reached in games

[Ebony Falcon]

Use hevean bro

kombuster drops my 2080 to 1650mhz max but in all games it holds 2055mhx solid

 

this program is designed to cripple your system