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Round 6 Fan Testing (Working Thread) - Page 41

post #401 of 476
Thread Starter 
Oh and regarding any other fan testing. I'm on a fan testing vacation for a while, planning to do more pump and CPU block testing, and maybe radiators again...so it will be a LONG time before I come back to fans again. 50 fan tests pretty well depleated my interest in fans for a while..smile.gif
    
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post #402 of 476
Quote:
Originally Posted by Martinm210;13117785 
The difference and benefits of the typhoons doesn't really stand out until you get above 1000RPM, and particularly in the 1800RPM range.

Below 1000RPM, it get's difficult to measure differences between fans and many are good.

I have yates dialed down to 900RPM using the sunbeam rheosmart during low load use and it's very nice and quiet.

I would recommend many fans below 1000RPM, many are very good. The GTs just stand out in the 1000-1800RPM range and particularly in the 1400-1800RPM range.

The F12's are good too, because you can actually run them via their own built in PWM controllers and their own daisy chain feature similar to the sunbeam rheosmart except you don't need the controller to do it.

If you really want silence in fans AND power, dynamic throttling is the way to go. I've just started experimenting with it myself, but definitely hook. No way I'll ever run fans at full speed using manual fan controls again..smile.gif

The F12s I'm looking at are the basic version and not the PWM one, but I believe they would be equal in performance.

And what is dynamic throttling, I tried to google it, but found nothing?
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post #403 of 476
Quote:
Originally Posted by Martinm210;13117805 
Oh and regarding any other fan testing. I'm on a fan testing vacation for a while, planning to do more pump and CPU block testing, and maybe radiators again...so it will be a LONG time before I come back to fans again. 50 fan tests pretty well depleated my interest in fans for a while..smile.gif

If anyone deserves a fan testing vacation (or vacation in general), you deserve it! This thread is fantastic. Thank you so much for your tireless and thorough testing smile.gif
post #404 of 476
Quote:
Originally Posted by cyper.bg;13121502 
The F12s I'm looking at are the basic version and not the PWM one, but I believe they would be equal in performance.

And what is dynamic throttling, I tried to google it, but found nothing?

I think the "dynamic throttling" is just utilizing the PWM feature, either through the sunbeam smart sensing thing that he mentioned, or using built in mobo PWM controls and software profiles that you can create.

After using the PWM feature with my H50 utilizing Asus's fan xpert program on my Win7 install, and being able to set custom fan profiles, I entirely understand where he is coming from. It makes no sense to me that people manually control fans or let them run at 100% the entire time they're using their computer. It's so easy to use PWM now considering that many mobos have 2-3 headers for it, plus you can get power splitters that will split the PWM signal to 3-4 fans per PWM header, plus use the power off a molex to not stress the motherboard. They've also got digital rheostats that will read the PWM signal and lower the speed of traditional 3 pin fans which do not support the PWM function.

After learning about these items, I am adding them all into my new watercooling build, so that I can run 3 fans on my radiator and not have them run at higher speed than necessary, including Panaflo fans. IMO the only thing on a watercooling rig that should be running 100% the entire time is the pump. Fans should run as needed, otherwise you're just wasting electricity and lifespan of the fan. Combine this new technology with the new downclocking feature of the Sandy Bridge chips plus the downclocking of newer video cards, and you can have the brawn when you need it, and the brains to keep the power consumption low when not needed, saving you money to spend on better components elsewhere biggrin.gif
post #405 of 476
Quote:
Originally Posted by Dr.GumbyM.D.;13122448 
I think the "dynamic throttling" is just utilizing the PWM feature, either through the sunbeam smart sensing thing that he mentioned, or using built in mobo PWM controls and software profiles that you can create.

After using the PWM feature with my H50 utilizing Asus's fan xpert program on my Win7 install, and being able to set custom fan profiles, I entirely understand where he is coming from. It makes no sense to me that people manually control fans or let them run at 100% the entire time they're using their computer. It's so easy to use PWM now considering that many mobos have 2-3 headers for it, plus you can get power splitters that will split the PWM signal to 3-4 fans per PWM header, plus use the power off a molex to not stress the motherboard. They've also got digital rheostats that will read the PWM signal and lower the speed of traditional 3 pin fans which do not support the PWM function.

After learning about these items, I am adding them all into my new watercooling build, so that I can run 3 fans on my radiator and not have them run at higher speed than necessary, including Panaflo fans. IMO the only thing on a watercooling rig that should be running 100% the entire time is the pump. Fans should run as needed, otherwise you're just wasting electricity and lifespan of the fan. Combine this new technology with the new downclocking feature of the Sandy Bridge chips plus the downclocking of newer video cards, and you can have the brawn when you need it, and the brains to keep the power consumption low when not needed, saving you money to spend on better components elsewhere biggrin.gif
Let me see if I understand: for example my mobo has just one PWM capable header. If I connect al my case fans to that header, then their speed will be based solely on the CPU temperature. How is this good?
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post #406 of 476
Yeah, I don't know, maybe in free air applications where there is little to no restriction. I'll put some tape on the interior and see what happens.
post #407 of 476
Quote:
Originally Posted by cyper.bg;13124208 
Let me see if I understand: for example my mobo has just one PWM capable header. If I connect al my case fans to that header, then their speed will be based solely on the CPU temperature. How is this good?

Well, it's good, because most of the time, your case fans only need to be active when your CPU is working. If you're concerned about GPU temps then motherboard controlled fans won't be your thing, there's no way to make your mobo adjust fan speeds based on GPU temps. OTOH, if your fans need to be turned up just for your GPU to not overheat and you actually experience situations where the GPU needs cooling while the CPU doesn't, then there's no point in trying to slow down your fans in the first place.

There are no disadvantages to PWM. If you want, you can just make it run at a constant speed just like a fan controller and if you have multiple fan connectors on your motherboard, you can control fans separately which can come in handy with different fans (e.g. if one fan is rated for 1000 RPM and the other for 2000 RPM, you can make both run at the same speed). Well, you can't run Ultra Kaze's off the mobo, but at that point you probably don't care about noise...
Edited by B!0HaZard - 4/14/11 at 10:32am
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post #408 of 476
Quote:
Originally Posted by cyper.bg;13124208 
Let me see if I understand: for example my mobo has just one PWM capable header. If I connect al my case fans to that header, then their speed will be based solely on the CPU temperature. How is this good?

You can use a program like SpeedFan to throttle your fans based on different system temp readings. My board has headers for temp sensors so I can control my fans based on the water temp using Asus's PC Probe.
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post #409 of 476
Quote:
Originally Posted by B!0HaZard;13124256 
Well, it's good, because most of the time, your case fans only need to be active when your CPU is working. If you're concerned about GPU temps then motherboard controlled fans won't be your thing, there's no way to make your mobo adjust fan speeds based on GPU temps. OTOH, if your fans need to be turned up just for your GPU to not overheat and you actually experience situations where the GPU needs cooling while the CPU doesn't, then there's no point in trying to slow down your fans in the first place.

There are no disadvantages to PWM. If you want, you can just make it run at a constant speed just like a fan controller and if you have multiple fan connectors on your motherboard, you can control fans separately which can come in handy with different fans (e.g. if one fan is rated for 1000 RPM and the other for 2000 RPM, you can make both run at the same speed). Well, you can't run Ultra Kaze's off the mobo, but at that point you probably don't care about noise...

The thing is I have a SLI setup, where the 2 cards are just 5mm apart, which makes the top one really hot. Apart from their stock cooling, which is one of the best (MSI Cyclone) I have put 2x 120mm fans to blow fresh air onto them, therefore the PWM option is of no worth to me. So in my case a fan controller is the best solution - if I'm just browsing the net then I want quietness and if I'm gaming then I want cooling power - all possible when turning a couple of knobs smile.gif
Quote:
Originally Posted by Seeing Red;13124425 
You can use a program like SpeedFan to throttle your fans based on different system temp readings. My board has headers for temp sensors so I can control my fans based on the water temp using Asus's PC Probe.

I've tried that, but I can't make SpeedFan change the fans' speed. It's just not working, no idea why.
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post #410 of 476
Thread Starter 
Yeah, I'm using speedfan on my rig now. I currently just have a CPU loop going at the moment.

My Swiftech MCP-35X throttles via it's own PWM controller, and my four yate loons throttle via the sunbeam rheosmart, both off of the one CPU header.

I use speedfan as my software control because MSI is lacking bad in this area. Asus and Gigabyte both have good software that will do even better. For me I'm simply using speedfan so that my system normally operates at 28% PWM. At 28% my pump completely silent at 1150RPM, and my fans dial down to 1000RPM. It runs like this 99% of the time except when I do something major like gaming or rendering video, etc.

I use a 42C CPU temp trigger to ramp up from 28%PWM to 70% PWM.

My ambient noise level went down from 42dbA to 35dbA which is very noticeable and I'm not giving up any performance. When I game, I have my headphones on, so I don't even notice the ramp up.

Here is a speedfan log of my ramp up and down of fans and pump.
sunbeam-10.jpg?w=425&h=489
Benefits are obviously noise, but also saving the life of the pump and fans. It makes no sense to run everything at 100% all the time if you are not loading 100% all the time...

I think speedfan could control GPU temps as well. I have also heard of people using the PWM header on the video card to do the same thing.

OEM HSF have been using PWM for a while now, just not many take advantage in watercooling. But with pumps like the 35X and fan controllers like the rheosmart, it's not costly to do anymore. Well worth while if you really enjoy the quiet..
Edited by Martinm210 - 4/14/11 at 11:18am
    
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