I'm rebuilding my computer soon because I'm gonna replace my motherboard, the problem i run into is that my gpu is way to loud (it's an rx5500 xt but because of the junction temperature the fans kick in early), if i want to keep it cool i have to ramp the case fans up to 1300rpm(3 120mm fans from id cooling in the front) i was wondering if i should get a case with sound proofing or get a case with better airflow and better fans(nf-f12's) because the sound is bothering me
There are several things that make a difference, but the primary one is the model of card itself.
I spent some time reading reviews when I got my 5700XT, and for me the clear winner was the PowerColor Red Devil, the reason being is that the fans do not spin up until the GPU hits 55C.
The GPU fans do not spin up unless I am playing games or running Handbrake (using the GPU) etc, even then, when the fans do spin up, it is a pretty quiet card compared to almost everything out there, but for me was the extra 5C before the fans spin up compared to the best of the other 5700XT cards (Sapphire card spins up at 50C and as such would be on a lot more when not gaming for my ultra quiet setup).
The rest of it comes down to the case, the case location, filters/no filters, fans, fan idle speed and so on.
Mine for example is on the floor in a Fractal Design Define 7 Compact using the dust filters, 2x custom 140mm fans at the front (Arctic Cooling P12, idle @640, top out at 1,000), 1x 120mm rear exhaust (120mm Arctic Cooling F12, idle 650, tops out 1,100), passive PSU that releases its hot air into the case, top cover sealed, all rear IO coversremoved.
The system is positive pressure and a fair amount of hot air from the PSU and GPU comes out of the back of the case below and to the side of the GPU as intended, whilst the hot air from the CPU comes out via the rear exhaust as well as likely some of the hot air from the GPU, but overall more air in than out only has one place to go, the gaping holes at the back below and to the side of the GPU.
Room is currently toasty (thermometer settled on 26.5C / just shy of 80F), GPU temp @ 49C with a flat line (HWINFO64), PC is virtually silent as it is under a solid wooden desk 3ft from my ear, and has no spinning rust.
Goal complete. Silent unless gaming, headphones even on low mean that the fans are drowned out, and many people would be happy with my system with all fans maxed out.!
Yes I could drop temps and possibly perceived noise by using a different case, but the goal is noise primarily (idling) and I chose extra low noise over cooler temps, but as nothing ever overheats, this is moot.
I hope my experiences and example help you.