Graphics Cards

[FirytamaXTi]

While Gaming (Ignore My Wallpaper, in this case I play Apex Legends)

Sometime when i'm gaming, my GPU are crash or Black Screen

While mining (Nicehash, Ethash Algorithm

And when mining, It's always "share rejected, share above target" 

in both problem VBIOS Running in Default Settings and I didn't overclock it