Graphics card broken by overclocking?

I have had a new PC with Gtx 780 and i7 870 for about 1 year, I do not want to go into the specs because I know that this is not very good, so please do not tell me that I should get a new PC as well no money.

I overclocked the graphics card at the time and had a crash and since then everything has gone wrong, games freeze after 5 minutes and one DirectX and driver error after the other

I looked for solutions and tried at least 200 things and nothing worked and everything kept crashing, I didn't play anything except Minecraft for 2 months because everything else crashes and then I found out how I can prevent the crash:

In the MSi Afterburner, I have to reduce the core and memory clock by about 30-40% and then nothing crashes anymore, but that means that games don't run so great anymore, I don't care about the graphics themselves, but playing Apex at 40fps doesn't bother and without downclocking in Apex 100fps it just crashes

Is there any solution other than downclocking, or did the overclocking break my graphics card?

Gtx780 windforce oc

i7 870

16gb ddr3 ram

500w cougar

Did you turn the volts up too high? Uninstall Afterburner.

Then you install DDU (Google helps) and remove your graphics driver.

Then reinstall the graphics driver.

Update the BIOS on the mainboard, this generally ensures that your system is more stable.

So to summarize everything again:

-Your card crashes in stock settings in many games.

-Your card will only work properly if you reduce the core clock.

Have you ever benchmarked all the parts? Is Windows freshly installed? Have the drivers been installed properly (!)?

A lot of information is missing so that one can help well.

Unless you have turned up the voltage, you can't cause any damage. Either the graphics card just broke, that sounds like a GPU defective, or the power supply no longer supplies the voltage and amperes that the system needs! That can happen.

If you have 40 euro, you could try a be quiet! Install System Power 9 500 watts

Overclocking always means that you are operating the electronics outside of the conditions recommended by the manufacturer, which can then lead to the burning of electronic components on the then overheated chips. Once damage has occurred, underclocking won't help either. Broken is broken, the defective component. So the graphics card must then be replaced.

It only works properly when I turn the core and memory clock down, everything has already been tested with old, new drivers and windows have been reinstalled 3 times anyway