normally ppl choose big fans because of low noise and high cfm.

i've saw my friend's fingers flesh almost ripped off from a FFB delta. the mighty 190cfm fan taught him to use fan grills and never work when the fan is operating

its what you've mentioned. hot air is removed and prevented from recirculating the whole interior of the case.

lets put it this way. by exerting more air into the case, you're creating a compression. to do this you will need powerful pressure fans or better else a air compressor. the output is still not tally with the input thus the hot air is still trapped inside. in addition, your fan might not operate at a high efficiency as the interior has a slight higher pressure as your fan is trying hard to push air in. if your work the other way round, creating a vacuum means more hot air will be removed. the addition of the vacuum in the interior means more atmospheric pressure is forces naturally in to the case. thus, a better cooling.

just my 2 cent

*edited typo

This post has been edited by Vervain: Nov 18 2006, 10:49 AM

what do you mean by hard disk fan? you mount it to a fan controller 5.25 bay? it depends on the temperature then. the fan controller will calibrate the fan speed according to the temp. you don't want to run the fan at max speed with screaming sound all the time right?

i have the 190cfm ffb delta fan. the whole fan is so heavy but due to the raw juice that's in the fan, its capable of propelling itself and run around the room if its not fasten. personally i think the fan is not practical cause of the terrible noise. it's mention that its not compatible with sidewinder controller. is there anyway to mount a VR to it?

neat. how much air flow can the baby run on such low voltage? what i'm concern is the sound. if commercial stock fans can push a decent cfm and lower noise dB as compared with the FFB then its impractical to use the modded fan.

just tried with my ffb, tough luck. it won't move an inch. better settle with the old nidec beta V

using the fan paired with the ninja. erm. noisiest fan in my pc. at full speed it's around 46db. even my nidec betta V is not as loud as it. this is one of the few 25mm thick fan that can reach beyond 100cfm. well interms of usage its pretty oke la. the bundled fan controller panel is alu silver and you can calibrate the fan speed up to your needs. as for me, the low speed is totally useless. i think at 2400rpm it pushes the same cfm as normal coolermaster fan. erm, motor might get warm a bit if you run the fan 24/7. For me, this is one of the best performance fan, cause as mentioned, it can push 110cfm approximately and other 25mm which can push similar cfm often have large dead spots. as for noise wise, its something you have to bear with it. but for tower hsf which cannot hold fans thicker than 25mm, this is one of the fan you should look into it. The white fan is really trouble some when you're doing maintenance, cause dust might dirt or scratch the fan. i've noticed that the sticker is printed evercool. could there be that sliverstone obtain the fan from evercool?

yeah precisely uncle ian. thanks for clearing the doubt.

from the spreadsheet it shows fm121 is better. lower startup, power usage and higher cfm. but the noise level? i think it's not the actual figure until you measure with sound level meter.

just get a cheap fan controller or mod via VR from electrical shop. that should solve it.

even nidec beta V and Delta focus flow is a meat mincher machine. One of my friend previously got his finger's flesh slightly chipped off. its almost the size 'guli'. Damn seriously need metal grills for safety.

200CFM is a bit too much. Not to mention the wattage consumption as well as the vibration. its more like a jet turbine. The highest I'd encounter was 220cfm. But its too thick to be a general case fan.