Originally Posted by PepeLapiu
Hot air rises. So if it is pulled in from top and front, then exhausted out the floor and back, as it comes out, it will rise and get sucked back in by the rads again. So if you want to pull in fresh air with your rads, do it from the floor and front (or floor and back).
Having said that, with the top and front pulling in air, you still will get better temps then recycling rad1air into rad2.
Besides, once you have your cpu and vga under water, your case won't be heating up nearly as much as when air cooling.
It's all about 3 simple rules:
- rads produce warm air
- warm air rises
- rads don't like warm air.
Now, about the components producing warm air to the rads. This is really a tits for tats issue. You can feed your warm case air to your rads, which your rads won't like. Or you could push your warm rad air onto your components, which your components won't like. Either way, you just have to flip a coin on this one.
Or you could buy an 800$ Caselabs case with separate rad chambers.
Hot air does rise, but you're talking about the distance the air has to rise in literally less than two feet vertically, it wouldn't make a noticable difference (this is speculation on my part)
I flipped the 360 fans, so all of my fans are intaking air and I have a powerful 140mm NZXT exhausting air (I have a speedfan profile setup so the NZXT fan is always running at a higher RPM than the fans on each RAD, as it has to exhaust enough air for 2 radiators)
My temps aren't really that different so far. It's really cool in my PC room (~16'C), and I'm running my Bitcoin Miner (both GPU's overclocked to 1200), and my Coolant temperature is 32'C, so almost exactly the same as it was before
Once my room temperature increases, we'll see if the coolant remains constant at 32 (which would thus drop my Delta-T), or if it hasn't stabilized yet and thus will keep my Delta around 16'C-17'Cedit: I ran a spare temperature probe to the outside of my case (away from any heat producing components or fans) where it's just picking up an ambient temperature, and it's reading about 5'C higher than my old run of the mill mercury thermometer which might just be old an inaccurate
going off the temp probe, my Delta-T is now 13'C (34'C Coolant - 21'C Ambient)Edited by joesaiditstrue - 1/25/13 at 1:46am