The resistor just slows the fan down? And it still cools adequately?
Loki build sound attenuation tip:
APW3 fans are screamers too. You could replace the PSU fan with 60mm Noctua (https://amzn.to/3UIblqM) + extra adapter (https://amzn.to/40EMXtR) for ~$24
OR,
You can slap a resistor on the stock fan for under two federal reserve coupons each.
Discussion
Yes.
So general rule of thumb (from personal experience blowing PSUs), do not exceed 1000w with the Noctua or up to 50% resistor as both cases are 3000RPM vs the stock 6000RPM and 1000W seems to be as much as that CFM allows.