The new rig isn't functioning properly.
It runs only slightly, the GPU is at full capacity, so I’m unsure if it’s limiting performance
Need at least 1866MHz or better speed. Don't count on 60FPS in SOTTR with decent settings and a 580.
CPU constraints play a significant role. The speed isn't just about performance but also how quickly data moves between memory and the processor.
I increased the clock speed to 1600 MHz
Additionally, if you can't proceed, consider moving to CL9 or CL8; CL7 reaches epic difficulty at 1600.
there’s no overclocking feature available in your BIOS, your motherboard is quite old.