I am thinking of buying the Noctua NH-U9s to cool my ryzen 5 2600. There would be no clearance issues with ram so would it be worth it to buy a second fan to use in a push pull config? If so, where do you get a second mounting wire to hold it on the side of the cooler?
According to the Noctua Website, you should have had another mounting wire included in the box. If you aren't trying to overclock and your temperatures aren't exceeding the limit or nearing it, I'd just stick to having one fan, but if you are looking to overclock or you find it is running hot, get another.