Originally Posted by SPL Tech
I'm going to be trying my first custom loop. All hardline tubing. Single 280 mm Corsair radiator mounted in the front with two QL140 fans. These are low speed fancy RGB 140mm fans that only run at 1250 RPM.
The main advantage of water cooling is increased cooling capacity & reduced acoustics. With the proposed setup, you are spending more money for likely similar performance of an air cooled setup. I disagree with the comments about "not enough rad" in the context of requirements. The 280mm radiator will dissipate that heat without your components over heating. That being said... it's not advised (due to cost / effort of what you are proposing).
It's going in a NZXT Elite H510 case. I'll be cooling a 2080Ti and 9700k, both being overclocked so I suspect it's going to pump out a ton of heat.
For reference, I ran a 3930k & GTX 780 (380w combined TDP) on a single 360mm radiator with 3 SP120's at approx. 1200 rpm. Cooling performance was fine but I would of preferred more rad. I was just limited on budget. You can check my build logs for stats if curious. Delta varied between 15 to 30c based on load, OC etc.
Second, due to the construction of radiators (dense arrangement of copper / aluminium fins), you should optimize your fan selection for static pressure.
You can see fan spec comparison here:
vs. SP 120 specs
EDIT: As you can see, the SP120s, a smaller and cheaper fan (half the cost) performs a bit better. That being said, Corsair fans are not that good. I'm not too knowledgeable on the best fans (performance / noise) but others can chime in here. I'd be looking at something like this Noctua NF-P14s redux-1500 PWM
based off a quick google search.
Cheaper than the Corsair LED fans you've selected, better performance, and similar dBA...
The question is whether I should pull air from in the case and have it exhaust out the front or take clean air in from outside and pump the heat into the case. Obviously pumping in 500w of heat into the case is not the most ideal, but I am thinking that if I try to take the air from inside the case and pump that through the radiator, it's going to result in increased coolant temp because the air coming into the radiator will hotter from inside the case than outside.
What do you think?
Given the context, 280mm radiator for two components, you should try to follow the rule of thumb before solving your direction of air flow.
120mm radiator per component + extra 120mm radiator.
If you are limited in radiator size and you're concerned with the stability of other components (Motherboard), ensure you have additional fans to provide fresh air to those components. Finally, you can just pick a direction that is most suitable for where your case will be located.
If you had more rad surface area, it would not be as critical to identify the additional fans but you're walking a fine line here...
, I advise the following following:
1. Increase radiator size.
2. Revise case if increased radiator size is not feasible.
3. If 1 & 2 are not followed, ensure you have additional fans for other components (motherboard etc.)
Hope this helps