The reports about failures of Gigabyte’s current P750GM are piling up and also my friend Aris Mpitziopoulos has already tested this power supply and, analogous to what you could read in the social networks, already had to dispose of it professionally with a capital complete failure and, after an also visually remarkable firework. The power supply from Gigabyte is of course only a pure additional purchase, because Gigabyte doesn’t have power supplies in its own portfolio so far. Here they simply reach into the OEM shelf and label.
The manufacturer here is MEIC (the homepage is no longer available), a newcomer in the desktop PC power supply industry and rather known as a producer of power supplies and various smaller adapters. However, MEIC has probably carried out orders from Enhance in the past, but they still don’t seem to have any real experience. Aris was kind enough to provide me with the original pictures and information. Considering what reproducibly occurs here, it’s better to refrain from using it in more demanding systems with performance-hungry graphics cards.
The main FETs of the power supply are from Jilin Sino-Microelectronics and did not survive Aris’ tests. They all died at the same time, indicating a problem with either the main transformer or the programming of the LLC controller, since according to Aris the FETs died AFTER the OPP (Over Power Protection) test was completed.
According to him, he followed this procedure before the PSU died with a loud bang:
“I increased the load on all the rails until the PSU shut down like it was supposed to. I let it cool and tried to restart it after five minutes, but was greeted with fireworks and a loud bang. I guess I had pushed its cheap primary switching FETs too far after all, so Gigabyte should lower the OPP and +12V OCP trip points.”
Furthermore, Gigabyte advertises the fan as having a hydraulic bearing, but Aris disassembled the PSU and only found a very cheap sleeve bearing fan. The bottom line is that we unfortunately have to draw the conclusion that a power supply was overpowered here and provided with false advertising claims. I would not buy at least this revision of the power supply.
Various threads on Reddit and LinusTechTipps have also taken up the topic in the meantime and it shows an alarming trend of now over 100 affected users in terms of damage or failures alone.
On the subject I can also recommend the video of Aris, who had tested this power supply very extensively:
Source: Aris Mpitziopoulos