Gigabyte Gaming Box PSU fan problem after fan upgrade
I just upgraded the PSU fan on my Gigabyte Gaming Box to a Noctua one. And now I have a weird problem of the fan not working. It works when I hard reset the Gaming Box by unplugging the power cable for a while and reconnect. And as long as there's some load on the GPU, the fan mostly stay on. However, when put in idle for a while, the fan will stop. After it stops, I can't get it to run again. There were a couple times that I lost power due to PSU overheat before I realize the fan wasn't working. And even when it was working, sometimes, the fan speed is definitely lower than what it was supposed to be given the load and temperature of the case that I can feel.
Anyone got similar experience and have a fix?
Hey @jnrfalcon, can you confirm which model of Noctua fan that you used? Also, how was your splicing job? I recall that this particular upgrade required splicing to get the right connector on.
You can make sure that voltage isn't the culprit by checking the upgrade guide on this forum. The recommended fan was a SUNON model which has published voltages. Compare those specs to the noctua fan that you selected. It may be the starting voltage is too low for the Noctua fan so it errors out at times (I had this happen on a Core X side fan I used).
NF-A4x20 FLX 12v version wired up using the supplied 3-pin to 2 bare wire adapter. Noctua fan has a lower resistance, 1/2 of what the original fan has. And thus a lower max power at 0.6w (original 1.22w-ish and SUNON is 0.8w, not much higher than Noctua). But I would think unless something is in series connection with the fan, resistance shouldn't be the issue... Also that SUNON fan is hard to come by now...
@jnrfalcon, thank you for providing the additional information. Given your information, here are a few things for your consideration
1. In my personal experience, using the supplied pin shape adapters (not ULN or LN adapters) in Noctua kits has caused problems before with shorts and messed up resistance values (on other projects that I have worked on). You should check the Noctua website and see the disclaimer they provide with using these convertors. This could likely be the cause of your issue. My recommendation is doing a straight splice. I had access to solder kit so I used a solder splice with electrical tape to seal the area.
2. The SUNON fan I used was: Sunon 40x40x20mm 3 pin fan #KDE1204PKVX. This has worked without issue in my PSU since March of this year when I purchased the RTX2070 Gaming Box. It is also objectively more quiet as measured by sound meters. I checked Amazon and it is still available for sale, however you can also visit www.coolerguys.com . They are based out of the West Coast and sell a variety of cooling fans which may be harder to find on more generalized platforms like Amazon and Newegg should you other options.
3. I also considered Noctua fans when I was looking to upgrade but saw that though it was more quiet, there was a decrease in airflow. This is why I chose the SUNON fan. I am concerned with temps in PSUs so I was willing to sacrifice some noise for reliable cooling (though as mentioned before, it is very quiet even under load).
Please let us know how your project goes! Happy to provide any assistance I can.