What would be the reason to try these? Being 38mm form-factor, the noise they emit has to exceed the stock fan noise.
The stock fan is 38mm.
I know it is, and so is the suggested alternative .... but the Nidec TA 500DC is a bigger form factor thus deeper fins
The wording was a little confused, it seemed to suggest that the replacement TFC would be louder because it was 38mm. Do you mean longer blades? That would be true. Have you gotten good results with the larger Nidec fans? If you have to hack up the fan to get it to fit, it seems like it might be more trouble than its worth for a 6% wider fan.