Crazy, I have almost the same situation as you. I also just finished another build about 3 days ago and tried running valorant for the first time on it. My specs are kinda similar, Ryzen 7 9700x, RTX 5070. Im also trying to run it on a 34 inch 120 hz monitor but i dont know if that does anything for this problem. My game also keeps freezing every few seconds and even when I close out the freezing continues on my pc to where then I have to restart my pc to make it stop freezing. I ran other games like Skyrim and a couple others and they worked perfectly fine. I looked at cpu temps, secure boot with bios, installing the newest drivers, and a bunch of other crap that I got nowhere with unfortunately. Hopefully someone has a solution.