The best thing to do as it seems to be a manufacturing fault is to find out if anyone else had the problem then go to gigabyte and say your card failed due to a manufacturing fault (you get a government given warranty for 6 months that you don’t have to prove it wasn’t your fault but after you do have to prove that) if they say no and keep refusing got to the consumer ombudsman or their alternative dispute resolution provider who is on your side. At least this is in the uk, you might want to check your consumer rights act if you are elsewhere.