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SilenX: the data and findings thread - Page 12

post #111 of 190
Thread Starter 
Quote:
Originally Posted by sniper007 View Post
So the Silenx fans are good for rads?
Depends on the Rad I am guessing. I am a fond of ThermoChill--they work super and so on the PA160 the SilenX is pretty good.

On another rad it might be a diferent story.







TBH I am not too impressed with this fan--i can see it has some design to it that may help with acoustics but they really dropped the ball with that buzzing click sound--it is startting to piss me off. For such a weak fan that is designed for silent case cooling I would have thought mor attention would go into the bearing and motor.

The fan is being run at full and temps are fluctuatiing between 49-51C and tthe mobo is getting up to 41-42 C

IF this was a truly silent fan I would be oka with that--but the San Ace is much much quieter at low and performs better.

Considering I can turn the fan off and get only a 2C rise the amont of cooling it provides is pretty minimal...
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post #112 of 190
Thread Starter 
Okay I am testing one of the 40 SilenX I bought from a memeber here in the UK. These are claimed 64cfm fans at 14 dba. Thwey are BAS body fans with a narrow nosecone.

I got these because I thought they were 72cfm fans...which they are not. Maybe I misundertood...maybe not. Whatever. I got about $800 i fans sitting around so I thought what the hell I will test it.

First impression is that it is a very quiet fan--I had to put m ear almost against it to hear it.

So far it is not showing any better temps than the FN122...but at least it sound better, and they cost me about $7 a piece so IMO that is a heck of good price for a quiet fan--if it can cool...

I am getting 59-51 still...so at least we are seeing some sort of variation from fan to fan.

Maybe since I started with the best of the best it would be nromal to have them all producing within a few C of each other.

Gonna let it do it's thing for about 15 minutes and see if it can pull the temps down any better than the FN122.







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post #113 of 190
Quote:
Originally Posted by CyberDruid View Post
Depends on the Rad I am guessing. I am a fond of ThermoChill--they work super and so on the PA160 the SilenX is pretty good.

On another rad it might be a diferent story.
I'm using the swiftech rad 120mm with a 120 X 38mm and keeps my 5400 stock at 29C idle and 38 C under load. I was planning to do the sandwich thing with another one. What you think about it???
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post #114 of 190
Thread Starter 
I have no experience with that rad...
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post #115 of 190
Quote:
Originally Posted by CyberDruid View Post
I have no experience with that rad...
ok but using the psh and pull method in a rad??
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post #116 of 190
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I have tried that but not done any verifiable bench work to show a repeated imporvement.

M techstation doe not have room for that--the RAM is in the way of the other potential shroud/fan.

I ne general I hear quotes of 2-3C difference...but TBH I would have to verify it for myself because youcan see that 2-3 C is what the CPU fluctuates anwa...so who is to say that it is the fans? It could be the CPU fluctuating and that's the screenshot. I am posting what I think are medians of temp--the place it hangs out the longest over about a 30 minute load test.

I keep the rig running so the temps never drop, but actually rise about 3C in the few seconds during a fan change.

A few of my LC configs use the case as an airbox--meaning the front fan is push and rear or top fan is pull...it seems to allow for the use of very quiet fans.

For example I built Waterclocker with a special shorud that deflected air form the front fan through the core and out the side--using only a Nexxus Silent 120 I was getting mid 50C temps with a P43.0e clocked to 4205 and Folding.

I put a Nidec 130CFM fan I got from JRabb1920 and saw only a slight decrease in temps. I flipped the molex leads from 12v to 5v and saw the same temps at about 1/10th the noise. That was like 3 years ago.

Since then I have tried a pull config with Velocitor and a Push Config with the Tech Station and a push/pull with Blu Dream and Pull Push...lol...with Ghost and with LAN Dream I use the case as an airbox for a pair of Panaflo Mediums in Pus config--one on the top and one on the rear--no front fan. This will be a rad I have no experience with: Magicool--a German Made Rad I got from Performance-PCs.com to try out.

It is reasonabl prices and misquoted as a 35mm thick rad--it is a 25mm thick rad--if I had known that I would not have bought it--buit since I got it I wanted to try it out.

ANd for Black Widow I am going with a push config using the rest of the case negative pressure as an airbox to Pull...hopefully...

I think the key to cooling a rad properly is really in the shroud and the offset of the fan.

The actual airstream is a very difficult thing to test or sens properly. All those different fan blade designs all sling air in dlightly different manners.

Some fans seem to be "wide angle" some seem to be like a firehose...so finding a fan that does what you want to the rad/shroud config is key.

Pressure is a big deal too--because speed is nothing without inertia...which is how I think of pressure...if the air just piles up when it fits the fins of the rad theair "behind" it is defledted off it's back so to speak and ventaully it spills out of the shroud and slows the fan...

Deep pitched props that sling a big slice of air with each revolution are more capable of forcing the air through the rad because the larger wad or "airball" is harder to slow down once it's in motion and therefore pentrates further before it slows down...that's how I see it.

So a shallow pitched many bladed prop may produce interesting cfm numbers but not be biting off enough air--but alinging smaller highspeed "air wads" that bounce off instead of go in the rad...

If you hold your hand infront of a fan you will hear it slow...it is sucking at the space and now your hand displaces the medium that it is sucking on...the opening of the case can do the sam thing--as can objects in the case in hte fans "airspace" so there is a lot to consider.

I have had a lot of interesting discussions about push pull with other members

The bottom line is it improves pressure. If you have a rad that's design responds well to high pressure fans...there ya go--pushpull should provide a lower temp...I think speed is over-rated--as almost all fans are undervolted to make them acoustically friendly.

Hence the large market segment for quiet fans that only puff 35-50 CFM.
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post #117 of 190
Thread Starter 
It's a quiet fan. Does not produce any odd annoying sounds... It does not produce enough airflow for this rad--would make a good general purpose case fan. I doubt it produces anything like 64 CFM...maybe 40...
Vapor would be able to tell but has not seemed terribly interested in this Out of Production model.

SO I have moved on...the next fan is the kind of fan I have a prejudice against...it's chomed and has blue LEDs and generally makes me think CHEAP POS...but I was pleasantly surprised...
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post #118 of 190
Thread Starter 
http://img165.imageshack.us/img165/5...rpro002me6.jpg











The Hiper fan is remarkably pleasant sounding--it definitely makes a sound--but it is the rush of air not the motor or bearings. In fact it is quieter than the GFX card which are very quiet...

Once lit the chrome blades are interesting--almost hypnotic. It's a great looking fan once it gets moving.

I can tell by the sound of a fan to a certain degree if it is moving some air--and this one is...

Temps show it too...it is right at 47C with all the other "pretty darn good" fans.

Considering that it runs full speed quietly and pushes enough air to bring the temps down to the same point as an undervolted San Ace or Full Volted SilenX I think we have a sleeper here.

I have not tried any Hiper products...the PSU I installed for friend worked--but I think it was kinda light for 580..considering my Silverstone 560 wa about half again as heavy.

But that is nither here nor there: the fact remains this particular fan is pleasant sounding, works great on the rad and looks good too!
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post #119 of 190
this pretty much confirms my theory of silenx as a POS.

Even my s-flex fans I had got better temps on a GTX240 than silenx ones, at the moment I got 4 panaflos undervolted actually pushing as much air as they say they do.
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post #120 of 190
Thread Starter 
Quote:
Originally Posted by Znth View Post
this pretty much confirms my theory of silenx as a POS.

Even my s-flex fans I had got better temps on a GTX240 than silenx ones, at the moment I got 4 panaflos undervolted actually pushing as much air as they say they do.

The first fan I tested was a so-called POS SilenX and it performs as well as all the other "pretty darn good fans" producing 47C at Load running Full tilt.

I wish you would bother to read the thread before posting nonsense.
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