Pharazon001

looks like the AIO is plugged into the CPU_OPT fan head, try it in the one next to it, which is CPU_FAN or the right one which is AIO_PUMP, according the the manual (i think)... iirc you'll often get that error when the CPU_FAN header isn't registering a value

well, i would try disconnecting all of the usb connectors on the mobo to see if that makes the usb 3.0 on the rear work. if it does then plug them back in 1 by 1 to see if one of the cables / connectors is causing the problem. if that doesn't make any different i'd try the mobo outside of the case, maybe a short is screwing with something. really not sure tbh though, does seem like a weird one. i don;t really see how the psu or the m.2 would cause the issue, as long as the plugs are properly in, so my guess would be something with the case.

one thing that happened with my 2080ti was that the fans would go to 100% sometimes, even when the temperature wasn't redlining and it was because the themal paste was badly applied and one bit of the die was getting too hot.. i had to manually repaste the gpu and all was fine after that... this was an evga 2080ti black gaming edition.

most x570's dont have SLI support either... you have to be very careful about your selection. it's mostly only really top end boards that have SLI comp now

iirc Rocket League is a EGS exclusive / "free" product now, so if you bought it though steam, launching it from steam will now launch the EGS to launch it

if i recall correctly if the card is not in the pcie slot quite right that can cause this issue, try taking it out and reinstalling it perhaps?

have you tied using iCue and not Corsair Link to manage the rgb? link is apparently EOL now and you should be using iCue

i had a similar issue with my card although it's not a similar card but even though the "thermal limit" of the card was 84c whenever the card would hit 78ish the fans would turn to 100% even though the fan curve didn't ask for it... it was suggested to me that it was possibly an incorrect application of thermal paste that wasn't completely covering the dye, causing part of the chip to get too hot (hotter than the given temp) and that would cause the surging fan speed. i repasted my gpu and this solved my problem but i know not everyone is comfortable doing this and just becuase it worked on my evga card certainly doesn;t mean that a gigabyte card might have a similar issue.

you sure it's not Error 52?

there should be a way to disable that post image and revert to to the original checks, etc which might show some more info.. go into the bios and try 1. disabling fast boot 2. disable boot logo / image.. it's usually different on every bios / motherboard where it is, but i'd try that

almost no manufacturers warranty will ever cover accidental damage...

really does sound like a pump failure to me... if you've still got the stock cooler that the cpu came with slap that on and see what happens. it's at least will eliminate some possibilities

do the case fans throttle down after turning on, or do they stay at a constant speed?

i have that same GPU, EVGA 2080ti Black and i have no such stuttering issues, or drops in voltage under load, so i doubt it's the card design...