Fans for push/pull set-up

Admiral Huddy · 17 Jan 2013 at 12:22

I currently have attached to my triple rad 3 x Scythe Kaze Jyuni 1200RPM which push around 68.5CFM at around 24db.

I'd like to run a push / pull system with some blue LED fans so was looking at installing the 3 x BitFenix Spectre PRO 120mm Fan Blue LED which push around 56CFM under 20db to be installed with the existing Scythe fans or with another brand.

I'm thinking though, do the fans in a push/pull configurations have to match air flow? My thinking is that they should.

So can i run the existing fans with the new BitFenix or choice another matching fan. I don't see the need for 6 x LEDs fans so 3x LED and 3 plain should do.

What do you suggest?

Avathar77 · 17 Jan 2013 at 12:38

Push-pull is not worth the money you spend on the fans!

pgi947 · 17 Jan 2013 at 12:43

Ditch the lot for 3 x 1850rpm gentle typhoons, job done

You need to look at static pressure over cfm.

Avathar77 · 17 Jan 2013 at 12:46

How did you get the cfm and db figures?
Very few fans will have the real world figures where most will advertise figures at lab conditions.

Admiral Huddy · 17 Jan 2013 at 13:03

from the OcUk website

Admiral Huddy · 17 Jan 2013 at 13:11

pgi947 said:
Ditch the lot for 3 x 1850rpm gentle typhoons, job done

You need to look at static pressure over cfm.

http://www.overclockers.co.uk/showproduct.php?prodid=FG-014-SY

Mentions nothing on static pressure?

Uncle Petey · 17 Jan 2013 at 13:16

Spectre pro's are relatively crap on heatsinks/rads in my experience.
If you mainly want them for looks, I don't see much, if any harm in putting them in as push fans and leaving your existing Scythes on pull duty.

Avathar77 · 17 Jan 2013 at 13:18

You would have to look beyond e-teller web sites for real figures

But yeah get the GT1450 or 1850 and put them on a fan controller. They will run much quieter and push or pull much more air at a lower RMP through a RAD.

ubersonic · 17 Jan 2013 at 14:18

Admiral Huddy said:
http://www.overclockers.co.uk/showproduct.php?prodid=FG-014-SY

Mentions nothing on static pressure?

Here you go mate

Model Name:
GentleTyphoon 120 mm Fan

Model-No.:
D1225C12B1AP-11 (500 rpm)
D1225C12B2AP-12 (800 rpm)
D1225C12B3AP-13 (1,150 rpm)
D1225C12B4AP-14 (1,450 rpm)
D1225C12B5AP-15 (1,850 rpm)

Manufacturer:
Nidec Servo Corporation (Japan)

Weight:
200 g / 7.05 oz

Dimensions:
119 x 119 x 25 mm / 4.68 x 4.68 x 0.98 in

Technical Data:
500 rpm: 0.015 A - 5 dBA - 31 m³/h
800 rpm: 0.023 A - 9 dBA - 48 m³/h
1,150 rpm: 0.034 A - 16 dBA - 63 m³/h
1,450 rpm: 0.049 A - 21 dBA - 78 m³/h
1,850 rpm: 0.083 A - 28 dBA - 98 m³/h

Bearing Type:
Double Ball Bearing

MTBF:
100,000 h / 35°C or 60,000 h / 60°C
*1,850 rpm Model 55,000 h / 60°C

And here's the static pressure curve: http://www.scythe-eu.com/index.php?...> | </a>&md5=3bae5b3860dcaa3e6f99afd7655f0428

IMO push/pull is never worth it unless you want pure temps and care nothing for noise, shrouds add nothing to noise and increase performance almost as much as push/pull.

Admiral Huddy · 17 Jan 2013 at 16:37

ah cheers buddy and thanks for the advice.. I might stick with just a standard setup as noise is an issue.

TwsT · 17 Jan 2013 at 16:51

GT's on their own will do much better than a push pull set up. Been very happy with my 1850's for a year or so now.