GTX 1060 losing performance over night

Jan 16, 2019
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I have a gtx 1060 oc. One night the card was working well, got good FPS and so. But over night next day i only got only 1/3 of my FPS. I didint do any driver updates or anything. Could this mean my card is dying. Its around year old and i bought it used. It was used to mine before.