Thank your Uncle profusely for giving you a very top end build.
Since this is a Corsair build, I would guess that your 1000w psu is also Corsair unit which will be plenty strong and is of good quality.
I would not worry about the psu.
You have an AIO cooler that is managed by ICUE.
I am no expert on that, I read in these forums that ICUE may need attention.
Failure after a time smacks of a heat issue.
Run something like HWmonitor. It will display the current, minimum, and maximum temperature of each of your processing cores.
Look at the minimum temperatures. If it is much more than 10-15c. over ambient, then there is an issue with your cooler or it's mounting.
Look at the maximum temperatures. You might see 100c. in red. That indicates throttling. It might be momentary, and that is normal.
It is the result of the motherboard boosting the cpu to get max performance, and then backing off when it hits 100c.
Only if the system crashes do you have a problem.
AIO coolers do not last forever. In time the mechanical pump can fail or debris can collect in it making the pump less effective.
Air will eventually intrude through the hoses, making the system less effective.
I would not expect this as an issue with a unit that is less than 5 years old.
I'm really grateful that you're helping me with this by the way!
So I downloaded HWMonitor and it says on my temperatures that my Values average out about 30-38c, my min is 31-39c, and my max is 31-38c. (I'll list all the temperatures below to be more specific just in case that's an important factor.) So I'm guessing this isn't an issue with my maximum temperatures but an issue with my minimum. How do I fix this?
TEMPS:
(Item: Value, Min, Max)
Micro-Star International Co. Lt...
TZ00: 27.8c, 27.8c, 27.8c
CPU Core: 36.0c, 35.0c, 39.0c
SYS: 33.0c, 32.0c, 33.0c
MOS: 32.0c, 32.0c, 32.0c
PCH: 44.0c, 44.0c, 44.0c
CPU Socket: 30.0c, 30.0c, 31.0c
Intel Core i9 13900K
Package: 34.0c, 34.0c, 44.0c
P-Cores (Max): 33.0c, 32.0c, 51.0c
E-Cores (Max): 34.0c, 33.0c, 38.0c
Corsair CMH64GX5M2B5600Z40
Core: 34.8c, 34.8c, 35.3c
Corsair CMH64GX5M2B5600Z40
Core 34.0c, 34.0c, 34.5c
SAMSUNG MZVL22T0HBLB-00...
Assembly: 36.0c, 36.0c, 38.0c
Intel(R) UHD Graphics
GPU: 35.0c, 33.0c, 38.0c
NVIDIA GeForce RTX 4090
GPU: 31.0c, 31.0c, 31.0c
Memory: 34.0c, 32.0c, 34.0c
Hot Spot 39.0c, 38.4c, 39.0c