Hello I recently built a new computer and i would like to have as many fans in it as possible. I currently have 2 standard fans that came with my case (Fractal define r4) and one CPU fan. I have 2 old fans from an Hp desktop that i would like to use as well, i found them online so you can see the dimensions.
You really don't want to do that. 80/92mm fans will generate a lot more noise and since they're coming from an old HP will more than likely be garbage. Rather than trying to jerry-rig those old fans, either get 120/140mm fans like your case supports, or do nothing and live with what the case came with. Fans for the sake of fans is worthless. If you're going to do it, do it right.
Well, I had a spare 92mm Arctic Cooling fan from my old case. Current case only had mounts for 120mms, so I twist tied it to the HDD cage to suck air through a vent at the bottom of the case. Doubt it made much difference to my temps, but I didn't document anything. It was simply an 'I'm bored, YOLO.' moment.
I did something similar with my northbridge heatsink on my IP35 Pro once. As the size of the fan didn't match the heatsink, I used thin hairties that I fed through the fan mounting holes and stretched over the heatsink fins to anchor the fan down. Apart from a cute little project, the gains were pretty much negligible, and the fan produced way more noise than it reduced heat. There's a decent enough reason why the incorporated heatsink fans of old (like, say, the old ASrock Extreme11 series) have been pretty much phased out.
Burn those small fans in a ritual bonfire... Then spend about 20$£€ for fractal 140mm fans, get some fan splitters, run them all at 5V from the integrated fan controller and forget noise and heat...
ziptie master level