No, you shouldn't exceed the voltage rating of a fan header.
No, you shouldn't exceed the voltage rating of a fan header.
The fans need 13.7 volts, but your motherboard only provides up to 12 volts. Using them might damage the headers or cause them to operate below their rated speed.
They are probably going to operate more slowly, yes. Also keep in mind their peak current since non-standard PC fans can handle varying loads depending on the motherboard and headers.
They seem a bit unusual, but they should still function, just a little slower. The voltage drop isn’t severe enough to stop them from starting. Regarding the mobo header, we need more details—specifically the current draw of the fans and the capacity of the header—to determine if it could be damaged.
These unusual fans might pose risks if used on a PC, as they could draw excessive current or cause back-feeding into the motherboard. It's important to ensure they're compatible with your setup to avoid potential damage.
I once experimented with a delta fan that made a loud blowing sound and pushed a lot of air around for fun. Over a few days it gradually damaged the header. It was an entertaining time, and my friends still tease me about it. I’d consider replacing it with a different one and wouldn’t connect it directly to your motherboard just in case. Just checked online—it’s a 24V 200mm fan. Even at 13.7V, I wouldn’t put it right on the board. It’s up to you.
The main concern is determining the highest amperage these fans can handle. They are limited by the voltage provided by the header, but they might attempt to draw more current, potentially damaging the header.