I believe your chip getting hot.
Blow a table fan and try memtest

Someone pls explain

Aah ah..another team extreme benchie. maybe sell off my TWSP and get it

UTT BH5 suck high voltage lol

Hungry_Wolf@
Burn-in?

1.Set the timing to the tightest as others with same chip as yours(2-2-2-5) etc.
2.Start from stock speed/voltage.Run memtest now!no erors?great.Start pushing 1-4 mhz.
3.Run memtest again.No erors?push another 1-4mhz.
4.If you get erors in memtest,try tuning the timings.If still doesn't help move the speed backward 1 or more steps where the speed was stable witout erors.
5.Start burning-in(estimate 10hours/1 night run) or more.
6.Try to raise the speed where you get erors before.
7.Now it should go without erors or less erors.
8.Burn-in for another 10 hours or more,still no go?tune the timings again,if it doesn't help,raise the voltage now.

Continue from the third step again and again until you get the speed you aimed,280mhz?maybe.jk

This step was base on my readings and experiance.If it doesn't works for you pls don't flame me.Im giving you something better than nothing.

Did you burn-in the rams?how many hours?our sifu babyelf burn-in for days ya know btw did the guide helped you in any way?

But you stil can blast the mhz with UTT though
But i second,not all chip can do on low voltage.