Blín D'ñero Forums

dontos wrote:230mm fan! That is one big fan! I thought 120mm was pretty much the largest for PCs. Well, the larger the fan, the more air you can move without making too much noise. I say you should go for it! :thumbup:

Here they are: http://www.coolermaster-usa.com/categor ... ry_id=1656 -- > http://www.coolermaster-usa.com/product ... ct_id=2892 ... But no picture, specifications or availability... so it seems.

Ahh, but here: $11.99

I think the thing it avoid too much of a pressure gradient between the inside on the case and the surround atmosphere in either direction. I don't think you would necessarily want too strong of positive pressure, as that might lead to a lot of air flow through the optical drives from inside the case and that might lead to a lot of dust buildup in them which is a major cause of failure with these drives. Of course you can filter the air coming in, which would help a lot by reducing dust and also reducing the volume of air somewhat, which would be OK if you had three big intake fans like that. In any case, I think a very slight positive pressure (close to neutral) is where you want to be. So if you have a lot of air coming in, you want that air to have an easy way out.

I noticed that one of these fans moves 110 cfm at only 700 rpm! So, there is definitely a benefit to going larger on the fans.

Yes, but it's not widely available (it is in USA but not here). This one by Akasa is, even my etailer sells it.

Frame Dimensions 220 x 30mm (170mm Fittings)
Fan Speed 600 RPM

Fan Airflow 95.63 CFM

So, you purchase from a UK etailer? How does that work? They are still using pounds and your country is on the euro, correct? I noticed that they rated the airflow in cubic feet per minute. I know that the foot is an English measurement, but I thought they switched to the metric system. Are PC cooling fans rated by CFM in Europe much, or do you usually use cubic meters per minute or per hour? Just curious.

My guess is that this larger fan size will become more and more common as CPUs, GPUs and chipsets continue to produce more and more heat which must be dissipated.

No i don't! It is available here where i buy from. I guess i put a wrong link in the other post.


It's always cfm and i usually compare to the average number for normal 80 mm case fan, about '30 cfm', without actually realising what it means.

There is a little over 3 feet in a meter (1 foot = about 30cm), so think of a square box that is about 30cm on a side.

Thanks! :thumbup:

I have the sidefans running in all 3 of my working PC's which are all built in Coolermaster Stackers (STC-T01's ) and have crossfire: 7970 CF, 5870 CF, 4870X2.

How PC Fans Work (pcbheaven)