Originally Posted by Whiskas
Can you elaborate which configs have you tried? This is exactly the information I looking for.
I always thought it's more important to make layout where intake is about the same as exhaust, not stuff in as many fans as possible. In this case (damn) one slot will be blocked by radiator anyway, so option 1. looks good for me, I think it will work. Also there is no way to make same amount of intake and exhaust when AIO is used. But as I said I'll try both of them and report temps so we can see if 1. worth considering at all.
I actually dont get using of 240-280 rads in s340, because then all you have as intake is warm air. But in your case I think it looks not so bad as videocard is also watercooled so you can just set H100 and radiator of videocard as intake, and top 140 fans as exhaust. That's how I would make it anyway.
Jayztwocents just made a video about mounting rads in the front of your case. Turns out it doesn't make much difference on internal temps. So don't be afraid to mount your CPU rad at the front - even a dual rad (240 or 280mm). https://www.youtube.com/watch?v=YCZ5iP5cu8g
The most important thing is to make sure you have sufficient air movement through your case and that the airflow is uniform (generally in the same direction). Having too much + or - pressure is a bad thing, but IMHO having slight - pressure is better than higher + pressure. Reason being is it will help pull out the warm/hot air being kicked off by the GPU etc. where as with higher + pressure, the air can become somewhat trapped and stagnant increasing internal temps. At least this is what I've found from personal experience and hours upon hours of testing.
Another thing to note is that bigger fans are not always best. I've observed better GPU temps when using 120mm intake fans vs 140mm. The reason for this is because the larger 140mm fans tend to "spray" the air outwards inside the case, where as the 120mm fans produce a more "focused" air flow which helps direct clean air right at certain components (the GPUs mainly). They don't necessarily need to run at higher speeds either, depending on the type of fan you go with. The Deepcool GF120's I'm using are really quiet, PWM and produce a surprising amount of flow for 120's.
Fan speed is another significant factor. Depending on whether silence or lower temps is your priority, you'll want to custom tailor your fan speeds to suit your needs. Some are content with running case fans at a constant speed and leaving them. Others (like me) prefer to have all the fans controlled according to certain temps. What ever your preference, just remember to take fan speed into account when trying to figure out the optimal fan/rad position setup for your system. What works well for one person may not work as well for another due to fan speed differences, alone.
I highly recommend the program "Fanspeed". It's free and freakin awesome! (once you figure out how to use it.
). You can turn on/off and control the speed of each fan connected to your mobo fan headers (each with it's own custom fan curve) with high levels of granularity and tie them to specific temps sensors in your system (CPU, GPU, mobo, storage devices etc.). It can do PWM and DC type control, even with 3 pin fans. At system idle, only my rad fans are running at about 700-800rpm. The CPU rad fan is controlled by CPU temps only and thus rarely ever ramps up. Once the GPUs hit about 55-60*C, the front intake fans kick in and the GPU rad fans gently ramp up as needed. System stays very quiet, temps stay low and dust build up inside the case has been drastically reduced (have 4 dogs