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Push/Pull using 15mm fans on one side ok?

I have a 480 radiator in pull fan configuration using the Noctua NF-AF12x25 fans but because of the space limitation on the other side of the radiator I only have about 20mm clearance. Know I can mount 4x slim 15mm fans and do a push/pull however the other 4 fans I have are normal 25mm thick, so would it be ok to mount 15mm on the other side of the radiator or is that not ideal? Noctua do NF-AF12x15 slim ones as well but obviously the static pressure or rpm is not gonna be good as the 25mm ones. Unless I can find a 15mm fan that matches a 25mm fan for static pressure.

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48 minutes ago, Shadowman said:

I have a 480 radiator in pull fan configuration using the Noctua NF-AF12x25 fans but because of the space limitation on the other side of the radiator I only have about 20mm clearance. Know I can mount 4x slim 15mm fans and do a push/pull however the other 4 fans I have are normal 25mm thick, so would it be ok to mount 15mm on the other side of the radiator or is that not ideal? Noctua do NF-AF12x15 slim ones as well but obviously the static pressure or rpm is not gonna be good as the 25mm ones. Unless I can find a 15mm fan that matches a 25mm fan for static pressure.

I wouldn't bother doing a push pull setup, especially with those expensive fans for such a minor improvement or any improvement in temps/noise.

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I would go for it, as you said the 15mm fans aren't going to perform the same as 25mm ones would but push-pull should still help.

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12 hours ago, Shadowman said:

I have a 480 radiator in pull fan configuration using the Noctua NF-AF12x25 fans but because of the space limitation on the other side of the radiator I only have about 20mm clearance. Know I can mount 4x slim 15mm fans and do a push/pull however the other 4 fans I have are normal 25mm thick, so would it be ok to mount 15mm on the other side of the radiator or is that not ideal? Noctua do NF-AF12x15 slim ones as well but obviously the static pressure or rpm is not gonna be good as the 25mm ones. Unless I can find a 15mm fan that matches a 25mm fan for static pressure.

I'd suggest putting the A12x25s in push. All fans are a lot more efficient at pushing, and I think that would be at least as much of an improvement as adding x15 fans in the front. But you wouldn't have to spend any money.

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