Quote Originally Posted by Martinm210 View Post
This was my one and only test and it was done on an RS120 with Yate Loon D12SL12 fans.

The difference between push/pull and push/pull with shrouds on both sides was pretty small only .3C over 7.6C which is only 3%. Keep in mind this was testing with a particular set of fans on one particular radiator. It's probably going to behave differently for your setup. I would expect fans with larger hubs like 38mm fans would see more gain from a shroud, etc.

Fortunately, there's really no negative to using a shroud other than space. My recommendation is if you've got the space and the means, shrouds are always worthwhile. Nobody has really documented it, but there may be some sound quality benefits as well. Just don't expect miracles, .3C on a 1C resolution sensor is not even consider measurable for your average user. You have to appreciate the microscopic gain for what it is.

Hope that helps...

Thanks for that but I think I didn't explain my question very well.

Take two 480 rads, one of the 480 rads is fitted with FOUR 120 shrouds, the other is fitted with ONE SINGLE 480 shroud. Do you think there would be any difference in the air movement and cooling between the rad fitted with four 120 shrouds and the rad with a single 480 shroud?