Several reports suggest those of Gigabyte GP-P750GM i GP-P850GM power supplies may have a high risk of malfunction or serious failure. In some cases, these PSUs have even come out with a literal explosion.
Well-known PSU reviewer Aristeidis Bitziopoulos noted the problem for the first time in his review of TechPowerUp in late 2020. In this review, he concludes that "Contrary to the Aorus power line, which was surprisingly good, this is a disappointment …. For starters, my sample died during the & # 39; overload rating, which is a shame. the primary switching FETs exploded with a big shock ".
It also explains the issue in this regard Video Hardware Busters.
An explosive power supply is almost as bad. However, the sample size is also as small as it could be here, so additional testing is needed to get anything close to a firm conclusion.
With that in mind, Bitzopoulos tested two more 850W samples. They both acted as they should without error. He also tells me that he asked the dealers and found that, at least in Europe, these models do not have unusually high RMA rates.
From this, it would be easy to assume that the 850W model is a little less likely to give up the ghost (which may be true) and that perhaps the 750W model was a poor sample. However, this is far from the end of this story.
On the one hand, there are other curiosities or points of concern with the Gigabyte GP-P750-GM that Bitzopoulos describes in his review. These include a high OPP protection threshold, poor quality FET, unknown plugs, a short EPS cable and an incorrectly advertised fan.
But that is still a long way off. Instead, it is a further investigation of another source that seems more worrying.
Following new reports from viewers about the failure rates of the Gigabyte GP-P750GM and GP-P850GM power supplies, Gamers Nexus also investigated the problem. He reports that 5 of the 10 units he tested failed "in an explosive capacity," which you can see a video example clearly. Surviving power supplies passed trouble-free tests, which also include a power supply in a stress test for an entire month.
(embed) https://www.youtube.com/watch?v=aACtT_rzToI (/ embed)
Clearly, not all GP-P750GM and GP-P850GM units are immediately defective, but those can have disastrous consequences.
Gamers Nexus says that the PSU problem that has been experienced could be due to a problem with OCP, OTP or OPP. These are circuits responsible for shutting down the PSU when certain values are higher than the PSU is designed to handle, such as high current or temperature. From testing, these PSUs can operate at a high value before shutting down in this way, and in some cases exceed these limits before shutting down.
Bitzopoulos tells me that he believes the problem is ultimately reduced to poor design.
“I firmly believe that this is just a bad design, FETs are not conducted properly and while in quick pre – checks and under normal conditions the PSU may be fine, there are cases (not just under stress) where they fail. The timing of the FETs is incorrect and this is due to a poor gate controller or poor implementation. "
He also says it’s probably an easy enough solution once identified, and hopes the OEM that produces this Gigabyte PSU, MEIC, will make a silent fix to fix the problem, if it hasn’t already.
This still leaves the existing GP-P750GM and GP-P850GM power supplies, which seem prone to higher-than-usual failure rates. These PSUs have also been shipped along with graphics cards as part of the Newegg Shuffle packages, and this could make them quite in use today along with the latest silicon GPU.
Gigabyte is at least aware of the problem, though we have yet to know of any other investigation on its part. Bitzopoulos reported an R&D supervisor after the tests, who told him that of the five samples tested by Gigabyte, all five passed OPP tests. And it looks like this has been the end.
We will need confirmation from Gigabyte to be sure of the scope of this issue, so I have requested an official response and will update this article if I hear anything again.
For now, my advice for those with this PSU installed would be to replace it with another. It's not an ideal solution, but it's simply not worth losing your graphics card or other components for a faulty power supply, especially if the kit is so valuable and the prices are so high.