Failing power supplies is a bad thing, especially as a PSU is a very critical component of a PC that can cause damage to much more expensive hardware, but Gigabyte's handling of the situation is even worse.
ExtremeTech has some coverage of the matter over here. Gigabyte has announced it will replace defective power supplies but the company is still refusing to take any blame and suggests inappropriate testing is what caused failures:
The dead power supplies are bad. What put the icing on this particular crap cake was the fact that plenty of consumers were forced to buy these PSUs if they wanted a new GPU from Newegg, thanks to the latter’s forced bundling policies. I don’t know how many people buy a new power supply when they buy a new GPU, but it isn’t unusual to see someone replace both, especially if they are upgrading an older system or an OEM rig. These are both units in the arguable sweet spot range for most users and Gigabyte is a trusted, long-known name. That fact makes the company’s attempt to dodge this issue worse. Instead of a deep dive into what went wrong, Gigabyte blamed the messenger and implied this entire kerfuffle was the result of inappropriate testing.Gigabyte has identified GP-P850GM power supplies with serial number from SN20343G031011 to SN20513G022635 and GP-P750GM units with serial number SN20243G001301 to SN20453G025430 as eligible for return and exchange service.