Hi Ro Gamer and Welcome to ROG.
Qcode 40 is your system telling you it has awakened from the S4 sleep state. (set from your power plan)
Monitor your temperatures in Windows using HWMonitor or you can check temps in Bios at idle.
Your system may cope with the H80i at 4.7GHz but not at 5.0GHz turbo. (Unless your in Norway)
The Corsair H80i is borderline cooling for the FX-9590 and may just handle 4.7GHz. It will most likely throttle if set at 5.0GHz.
Idle temps should be Ambient + 10C and 60-65c under load. (Stress Testing and depending on cooler)
I have Corsair H110 and just copes at 5.2GHz under load.
Can't help with the popping sound but your nose will tell you if a component is burning.:(:(
We owe our existence to the scum of the earth, Cyanobacteria
My System Specs:
MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
CPU:AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t
Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2
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