elysion
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Post by elysion on May 30, 2012 10:47:13 GMT
Noctua has announced new fans with noise cancellation. They will update their product line within the next 12-18 months. They've presented first samples of their NF-F12 fans. noctua.at/main.php?show=start&setlng=en&products_id=www.heise.de/newsticker/meldung/PC-Luefter-mit-Gegenschall-1586080.htmlI have three NF-F12 PVM fans (current model without noise cancelallation) in two of my PC's. The NF-F12 is a very powerful fan with high static pressure. Of course, you can hear the airflow itself at higher speeds. I use one NF-F12 ontop of a Prolimatech Samual-17 CPU cooler and two as case fans in a overclocked system where the high static pressure is highly welcome to provide additional cooling. I really can recommend Noctua fans even without the coming noise cancellation. If I buy new fans, then I buy mostly Noctua. The price of the Noctua fans is higher, but you get better performance than with many of its competitiors and a lot of accessories like cable extensions and/or low-noise adapters and a six year warranty. Other corporations that make good fans are Scythe (a brand name of NMB Minebea) and Pabst, but there is an almost countless amount of other brand available.
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Deleted
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Post by Deleted on May 30, 2012 11:13:34 GMT
Christian If they are able to be used with manual or linear control I would be interested, but the last thing an audio PC needs is more M/B controlled PWM fans whose large current pulses reflect right through the whole PSU.I use 2 front mounted 12V fans in series running quietly at low speed from 12V, instead of a single PWM contolled fan running at higher variable speeds . It has been my experience that aftermarket quiet fans used with PWM control often become noisy, perhaps due to the pulsed operation ? Alex
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Post by gommer on May 30, 2012 14:46:43 GMT
What Alex said. I use 80mm and 120mm Papst fans at 7V (connected between 12V and 5V, 5V is usually loaded heavily enough to allow this configuration).
Added bonus: they are virtually inaudible, even after 7 years of use now (second system in old case).
Cheers, Marc
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elysion
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Post by elysion on May 30, 2012 15:51:48 GMT
Noctua sells a lot of fan types which have no PVM signalling, but delivers low-noise adpaters for fixed speeds instead.
Despite the three NF-F12 PVM's mentioned above, I have only fans from Noctua without PVM. I use the NF-F12 PVM's only with a CPU heatsink (its intended purpose because of the high static pressure) and for the case of my flagship PC, which runs overclocked. My main goal was NOT a silent PC here, but an extremely stable overclocking platform with a lot of cooling reserves. In this PC, the PVM fans should be not a real problem (from the PSU viewpoint) since I use a high-end SeaSonic PSU which can easily deal with the current pulses. The fans themselves don't use a lot of power at all. The main problem in my flagship PC is still the stock Fractal Design 140mm fan. I've replaced all other fans with fans from Noctua. The Fractal Design fans are good for the price you have to pay, especially if they are bundled with a new case, but they are nowhere state-of-the-art. Some of them even MAKE noise (the 140mm fan for examply). Perhaps, I'll replace that fan also, but I have to be careful with tossing out money at the moment.
I absolutely agree that PVM fans are not the best idea for a quiet PC. You hear it clearly if the speed is increasing or decreasing. If the fans runs at a fixed speed, you can ignore the noise better.
I like the colour scheme that Noctua uses. It's highly distinctive.
BTW: My favourite PC cases are from Fractal Design. I also like some of the Lian-Li cases, but I don't like it screwless everywhere. Lian-Li was going a bit too far with being screwless. For example, I hate screwless expansion card or drive fixing.
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elysion
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Post by elysion on Jun 8, 2012 14:59:33 GMT
More details about the new Noctua fans with noise cancellation: www.heise.de/newsticker/meldung/Weniger-Luefterlaerm-durch-Gegenschall-1613219.html(Sorry, again in German.) They will use a technique patented by Rotosub: www.rotosub.com/(This time, it's in English.) They've also posted a video with a working prototype. The electronics for the noise cancellation is placed in an external box at the moment, but should be integrated in the fan itself in the final product: The video doesn't let you hear the benefit very clearly (IMO), but people that have seen the prototype at Computex in Taiwan reports that there was a remarkable difference. I'm extremely curious about the price point of the final product. It will be only an niche product if the price is too high. Current Noctua fans aren't cheap. Buy three 120mm Noctua high-performance fans and you've spent almost as much as for a Fractal Design case with two 120mm and one 140mm fans. This was my experience with the price so far, but IMO the fans have been worth the money. I can't justify spending even more for fans though. There is a price limit for me. How much power the electronics for the noise cancellation will draw is also a good question that has to be answered. The Rotosub technique uses allegedly small magnets on the fan blade and is able to alter the shape of the blades during use. Noctua is also developing water-/dust-proofed fans for industrial applications. They will renew almost their whole product portfolio in the next few months, including the release of some newly available sizes (40x10mm, 92x14mm for example).
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XTRProf
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Post by XTRProf on Jun 14, 2012 4:19:00 GMT
Very interesting! I will keep this Noctua noise cancellation fans in view for my future computer audio only PC.
Btw, any idea what dBA we are talking about here? Current normal medium size fans already have reached below 20 dBA with my recent laptop Genius cooling fan reaching 13 dBA.
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oldson
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Post by oldson on Jul 30, 2012 19:46:05 GMT
Christian If they are able to be used with manual or linear control I would be interested, but the last thing an audio PC needs is more M/B controlled PWM fans whose large current pulses reflect right through the whole PSU.I use 2 front mounted 12V fans in series running quietly at low speed from 12V, instead of a single PWM contolled fan running at higher variable speeds . It has been my experience that aftermarket quiet fans used with PWM control often become noisy, perhaps due to the pulsed operation ? Alex sorry to hijack the thread. i have a new pc, with large fans (200mm+). it is audibly quieter than my older system which used 120mm fans. all 4 fans on my new system are plugged directly onto my asus p8-77v motherboard. i was hoping to make use of Asus' fanexpert2 utility, to lower the speed/noise of my fans. but this utility is proving to be less than reliable (ie. it is SHI**). due to this , i have been considering a hardware fan controller. is this generally considered better for a system when used for audio? if so, then this would be the "final push" required for me to buy a controller. as a matter of interest i have been interested in the scythe range. from your comments, am i right in thinking, that fans plugged into the motherboard can induce noise into your audio? cheers
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Deleted
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Post by Deleted on Jul 30, 2012 21:32:18 GMT
Hi Oldson I have proved to my own satisfaction that the SQ of rips is better when non essential PWM controlled fans are disabled. I changed the 2 fans in front of my HDDs to running both in series to lower their speed and run quieter ,as well as not using PWM control, but direct 12V. SOtM also makes a Fan Filter PCB to help overcome this electrical noise getting back into the system when using motherboard PWM control. Regards Alex
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oldson
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Post by oldson on Jul 31, 2012 19:13:05 GMT
Hi Oldson I have proved to my own satisfaction that the SQ of rips is better when non essential PWM controlled fans are disabled. I changed the 2 fans in front of my HDDs to running both in series to lower their speed and run quieter ,as well as not using PWM control, but direct 12V. SOtM also makes a Fan Filter PCB to help overcome this electrical noise getting back into the system when using motherboard PWM control. Regards Alex cheers Alex i am gonna get a controller
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Post by eugenius on Aug 11, 2012 12:43:01 GMT
I have 5 noctua fans for a few years now, no problems at all, didn't start buzzing or vibrating after a few months like the previous yate loon, nexus and scythe sleeve bearing fans I had. Now I'm going fanless but they are good fans.
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