Originally Posted by Whatts
This is a bit out of left field, but has anyone ever thought about mixing up flow directions on 1 rad?
Say for a 360 having the outside fans exhaust and the middle fans intake?
We all do
I can only think of one possibility where this would work. If you had a case that was fairly well sealed - and you had a radiator that was front-mounted - you could place a divider panel (acrylic or metal) between the two sets of fans and run it to the MB area. If the divider ran the entire width of the case you would essentially have a wind-tunnel shaped like a C with the MB in the middle of it. So the fans on one side would push air in - and the fans on the opposite side would push it back out (after it thoughtfully caressed the MB and took some extra heat with it).
Still wouldn't be terribly effective - but at least you wouldn't just be creating an re-circulation eddy at the radiator.
Originally Posted by SortOfGrim
that will only create a recirculation of hot air
This. Although to be honest, once the air is outside the case you don't really have to worry about that much at all because the volume of air in the room will equalize with the hotter air from the PC almost instantly (you might lose 1C but I doubt even that). That's why even if you are OC'd to the moon and running your GPUs full blast... the whole room might get noticeably hotter over time - but the air a foot away from the PC will be essentially the same temperature as the air 5 feet from it (barring HVAC or environmental factors). Thankfully actually... otherwise we'd have to have registers every 6 inches to heat or cool a house well.
No matter what you do - I haven't found a ton of difference... however, I have noticed less dust and very, very slightly better temperatures with basically EVERYTHING that moves air set as an intake (provided they are all dust filtered that is). Although in a case that doesn't have as many holes as a CL case does... it might be a good idea to have at least one or two exhaust fans.