So I need help with two issues/questions. To make a long story short, I swapped out my i7-8700k/Asus Prime z370i mobo/cpu setup for my girlfriends i5-7600k/ Asus Prime setup. I had a lot of trouble with keeping this cpu cool with the Noctua LH-9i. When I swapped out the motherboard/cpu's I also went back to the NF-A9x14 fan that came with the Noctua cooler. Currently I am using the clear DanCase side panels with 6mm spacers to offset the window off the chassis by 6mm. So I used aluminum spacers between each mounting hole to provide a little more space and to help with airflow of course. I will post up pictures in a few hours. So I am currently running an i5-7600k/Asus Prime Z270i with a stock Noctua NH-L9i cooler setup. I have a Noctua 92mm PWM Redux fan I can switch to if it would help with cooling. I want to try and undervolt this cpu to give myself a little more headroom for gaming. Currently with the fan setting at 100% I cannot run a full Firestrike 3DMark test without the program shutting down do to the cpu getting too hot. So, with a Noctua NH-L9i with my i5-7600k what is a safe voltage setting or wheres a good place to start with undervolting. Also, I tried to change it the bios a few minutes ago and I could not figure out how to change the number next to drop down. I changed the dropdown to manual mode. Edit: *Sorry, this is my first thread. Pics are working finally.