So thats the layout of the new case im in the process of building but before I go making the brackets and fixings I wanted to get some opinions on how well the airflow would work The 2 rads are the stealth 240s and the plan is to have a 120mm intake in the front and an 80mm in the rear (cooling the hard drives) but will the cross flow of air cause any problems? and will the gfx loop stay cool enough? any help you can lend will be greatly appricated and will of course get some BIG rep
I think you'll get a lot of turbulence in the case from the intake/outtake ratio. Cross flow is good. A little turbulence could be good, but this might be too chaotic. I'd think going bigger on the output would help suck air straight through, cooling the rads in the process. The case dimensions play a big part as well. Is it a normal rectangular ATX case? Not an expert, so don't go switching things up on my say so.
Don't know much about water cooling, but I assume it's a push/pull config on the rads. I also assume three fans per rad. So input is five fans and output is three fans. A bit of an imbalance. Of course fan speeds also come into play, so dropping fan speeds on the input side can balance out the system so enough air is being drawn out. Passive Venting also is important, but no info provided about that. EDIT: OK just looked up those rads. Only two fans but the argument still holds. Four in two out.
Always have more air beung pulled out than pushed in, it creates negative pressure and it saves power, thus resulting in better cooling We just fitted a set of new fans and vents on the bus' computer systems at work, and the systems have become a lot more reliable (cock ups in the electrics were pretty frequent beforehand) I'm assuming that the right rad is at the bottom and the left rad at the top, so you have to bear in mind that there is also the PSU fan blowing or sucking air, depending on the make/model as well as what you already have, so the bottom hard drive might be better as an exhaust
dust... lot's of it. If you have more In than Out (Positive pressure), then you can filter the intakes. More Out than In (Negative Pressure), will pull air in through every nook and cranny (Nature abhors an imbalance in pressures), which are NOT filtered. Welcome to dust hell... the higher the airflow through your fans, the worse this problem will be. The difference between in and out airflow should be *slightly* in favour of intake... unless you like dust, in which case, negative pressure has a slight performance advantage, that is negated if your airflow path is half-decent.
No, you want positive pressure! It forces fresh air into the system as it naturally vacates through holes and pores in the case. As long as those fans are filtered it reduces dust, rather than having it sucked in through gaps.
Thanks for all your help guys Ill try and be a bit more specific with dimensions etc and put up a new diagram with a better angle (overhead front). Bottom Section: 150mm x 525mm x 200mm (H / L / D) This is similar to some of the lain li and the temjin tj09 and will hold the 2 x 120 rads , HD caddy and the PSU (side mounted with the intake bringing in clean air through the left side panel and exiting through the rear of the case) Fans In - 120mm x 3 (2 pushing through rad, 1 pulling in fresh air from the front) - 80mm x 1 (air passing over HD's) Out - 120mm x 2 (pulling through rad) Other Stuff As far as filters go its not a problem and was something that was planned a while back after cleaning out my old dragon and nearly choking There was no plans for any passive vents but of course if its going to help then its no big deal to add some into the design as the side panel design hasnt been finished yet Thanks again for the great advice <3
ah, nice to know... on an open topped bus you don't tend to worry about that as much, as they're going to get dusty anyway
