New GPU - Loop - Heat

[noobftw]

I currently have an i9 7900x and a 1080TI FE, both are overclocked, CPU is at 4.6Ghz. See Attached Images

 

All of this is running in a single custom waterloop with x2 Alphacool NexXxoS ST30 Full Copper 420mm radiators (Push configuration) and a D5 Pump. The case is a Dark Base Pro 900, one of the radiators is intake (front), and one is exhaust (top), only other fan in the system is an exhaust fan (140mm) out the back of the case.

 

Current System Temps while gaming......

 

Water Temp: 40c

Water Pump Speed: 2.9

Radiator Fans RPM: 1000/1100 RPM

CPU Temp: 62-72c

GPU Temp: 46c

 

Question, if I replace the 1080TI, which has a TDP of 250 stock (FYI my GPU is overclocked so will be higher), with the 3080 (TDP 320) or the 3090 (TDP 350), and don’t overclock the new GPU, (1.) will my radiators be able to handle the extra heat?

 

(2.) Will I have to increase my fan speed? By how much…

(3.) Will the water loop run hotter, how much hotter? Will it be too hot for the soft tubing I use?

(4.) Will the additional heat of the 3080/3090 heat up my CPU more than it is now?

 

Thanks in advance.

[jaslion]

You can cool a 3090 on a single thick 120mm radiator with a decent fan and keep it below 80c so yeah your setup is beyond more than enough to handle it.

 

The cpu will probably heat up a couple degrees because of the higher thermal load but nothing that should be a problem at all. The reason it runs so hot is because it's just kinda crappily made. Not your fault but intel for rushing and cheaping out.

 

edit:

 

Worst case you open your casedoor and watch the temps drop as that case has very restriced airflow by default because it is a silence focused case. Which with a custom loop is just kinda pointless :p.

[noobftw]

13 minutes ago, jaslion said:

You can cool a 3090 on a single thick 120mm radiator with a decent fan and keep it below 80c so yeah your setup is beyond more than enough to handle it.

 

The cpu will probably heat up a couple degrees because of the higher thermal load but nothing that should be a problem at all. The reason it runs so hot is because it's just kinda crappily made. Not your fault but intel for rushing and cheaping out.

 

edit:

 

Worst case you open your casedoor and watch the temps drop as that case has very restriced airflow by default because it is a silence focused case. Which with a custom loop is just kinda pointless :p.

Good to know, I have heavily modded the case to improve airflow. Just a bit worried about coolant temp increase. Anyone know the max temp water should run at in soft tubing, and through a D5 pump?

[jaslion]

1 minute ago, noobftw said:

Good to know, I have heavily modded the case to improve airflow. Just a bit worried about coolant temp increase. Anyone know the max temp water should run at in soft tubing, and through a D5 pump?

60c for the pump and soft tubing is below boiling but good luck even getting your coolant even to 60c. That takes a lot of energy to do and with those rads that should pretty much never happen.