After getting tired of having my Xiegu G90 reach temperatures of 100+ F I tried the Radioddity G90-H1 cooling fan and bracket. It is, in my opinion, a must have for your Xiegu G90! It has an automatic temperature control! Depending on the temperature of your Xiegu G90 the G90-H1 fan will spin between 200 - 3000 rpm. The current consumption of the G90-H1 is max 150 mA at 12 volts.
Ya gotta run 'em at full output occasionally to Getter the Anodes, I thought all oldtimers know that.
This is my RPi temp with no fan. Well within operating limits. I would worry if it was 150 F, But that is still within design limits. P.S. My Foreman grill runs about 350 Deg F. So you have a long way to go.