Question Pc stops recognizing ssd after leaving it idle for a couple hours

[Doofy14]

Alright so i've had this samsung 850 evo 250gb ssd for a year and a half i think and i started having a specific problem with it. So i reinstalled windows 10 pro a couple days ago because i was having blue screen issues that now got resolved,the problem is that if i leave my pc idle to say download games from steam a while later windows will reboot into bios and show me that no drive is connected to my pc, i have checked the sata cables,changed power settings nothing has worked so far,Im thinking maybe the ssd is not capable anymore since its been almost two years since i bought it? samsung's magician software say's its in good condition and has the latest firmware update on it though so this is what confuses me.

 

[rgd1101]

or could be the motherboard/psu.

full system spec? include make and model of the psu