Question 3900xt died

Oct 13, 2021
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I bought 3900xt 7 days ago and was auto oc in ryzen master on b450m ds3h. Suddenly it went out, I was using it via remote computer so thought it may be needs gpu. So i plugged it but nothing. Then changed it to tomawahak max 2 and cpu light is on and nothing working now. But is heating so it must be working somewhere.