Not enough wattage broke my gpu?

Solution
The problem is likely due to your motherboard and cpu not being compatible. That board was not designed to accommodate a 220w cpu. Very few boards can run a 220w cpu and even then they can have stability issues.
MERGED QUESTION
Question from Yoyoman199 : "low psu brakeing gpu?"

i got a new cpu and i didnt know it needed more wattage. so i ran into with 60 watts below what i needed. it crashed and each time it had less time.
i thought it was the cpu fan overheating
i truobleshooted for multiple days. until it would only turn on for a few secs beep then turn off. eventually the gpu's fans stopped. i orderd a new power supply and this is my old one https://www.newegg.com/Product/Product.aspx?Item=N82E16817438025

my specs are (not including psu)
fx- 9370
XFX Radeon r9 390x
samsung 250 ssd 3.5
1tb hdd7200 rpm
16 gigs of ram
ASUS M5A97 R2.0 AM3+ AMD 970
 


It's unlikely this was the problem. I'd more strongly suspect your motherboard, which was not made to handle this CPU. I'd return the CPU if you still can; that was a poor purchase decision. The B1s PSU line wasn't very good, but a 750W should've been able to handle it -- manufacturers are very conservative with the wattage requirements because of how much literal garbage is out there.