Should I put them both on the sys-fan header with a splitter or can I attach one of them to the cpu_opt, and if so which would be best to go there, the 200mm intake fan or the 80mm exhaust fan? Thanks!
Yes, case is Thermaltake Suppressor F1 (I had an extra one in box until now.) Pic is stock, I have installed an 80mm exhaust fan. This is going to be a gaming pc so I also upgraded the cpu cooler and installed a RTX 4060.Make and model of your case? Looks like something Thermaltake made about a decade ago. From your picture all I see if a single 200mm fan, which should be 3pin and there are no fans mounted to the rear which I'm assuming is what you're referring to as 80mm mounts. Make and model of your motherboard?
Usually you would want the intake fan to be connected to the CPU-OPT since it most likely has a quicker ramp-up time than the SYS-FAN. You should check your motherboard's bios to see what ramp-up settings are available for both connectors and choose the quickest ramp-up for the intake. And with that motherboard, a higher wattage is available for the CPU-OPT connector, which is another positive factor for the larger fan.