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But of course. Multiple rpm signals will only confuse readings. That's why it makes sense to daisy chain same type of fans so that rpm signal of one of them would be indicative for all of them (and fans that should be regulated simultaneously for same speed, eg. all fans on some rad)
I'd prefer that it had multiple channels instead of having to daisy chain everything.Quote:
Originally Posted by churchy
I guess I don't mind small grps in each channel...
But ideally it'd have 10 channels so it can accommodate the most 3-pins I'd need, each on their own channel & with their own RPM feedback & regulation.
Finally I'd prefer that it interfaced with my MB (including future EFI ones) to get it's cue of when to regulate, & a few "quality" PWM channels to boot! :)
One can dream, sigh....
Bing/Miahallen, got a few minutes? If you do, thanks! :)
Quote:
Originally Posted by jalystHey folks,
Just a few older posts missed by some of you, plus some newer ones I'm responding to.
Bing if you got a minute, could you please address these two (below):
Quote:
Originally Posted by jalyst
Quote:
Originally Posted by jalyst
Does this mean that if I try to run 1-or-more 5400RPM PWM GT's, off 1-or-more of my MB's PWM fan-headers...Quote:
Originally Posted by miahallen
That I also won't get decent PWM control w/a duty cycle at 0%, & hence won't be able to lower it to 1000RPM?
I still find it hard to believe Scythe is selling a 5400 rpm GT, and not offering the D1225C12B6AZ-00_2150rpm:shakes: WTF!
They can't even keep stock on the 1850, the 2150 would be as big of a hit. No problem getting lower speed GT's, there is a marketing lessen here Scythe!
Why the hell would the enthusiast community buy a 5400 rpm fan, in any kind of numbers? I would buy at least 25 GT's if I could get them in 1850 and 2150 rpm. And right now, I can't even get 1 in a speed I want.
Anyone here from Japan that can wake these guy's up:shrug:
But they are not PWM:down: They are selling them with a 4pin molex so people don't plug them into their mobo.:smoke:Quote:
Originally Posted by jalyst
Maybe the 3000 rpm will undervolt good enough, I hope so, it's a fan I want, but still can't get. Bet the 3000 sells out first;)
I can't buy a AP-15 anywhere I know of either.
Thinking about several of these~9S1212F4011http://db.sanyodenki.co.jp/product_d...1247018714.pdf
They are expensive, but I like the way the M version sounds. But more importantly, I can get them easily, pretty much anytime.
So there ARE pwm high rpm gts? Link please
yeah, but not in the US anytime soonQuote:
Originally Posted by Boogerlad
BTW, for those wishing for a simpler way to get hold of high-speed GTs maybe this new addition of GT AP-30 4250rpm to inventory of frozencpu might help. I doubt in it's minimum rpm still being in tolerable range for me or at that range it being better then GT AP-15, but well, for someone else, who knows.
Damn it, you just had to link that didn't you?:mad::p: I was hoping nobody would notice that until I got a couple of AP-29's for myself. ;):rofl:Quote:
Originally Posted by churchy
Quote:
Originally Posted by churchy
Ya, not me;) I want a AP-29 to test, but doubtful.
FYI, was perusing fan controllers and noticed Sunbeam is planning a new one that plugs into the motherboard. It sounds like it would work like their old rheostats, but use the PWM signal to adjust??
Not sure, but it looks interesting. Are these available anywhere yet?
http://www.sunbeamtech.com/PRODUCTS/Rheosmart/6.html
http://www.sunbeamtech.com/PRODUCTS/...0/_MG_4658.jpg
http://www.sunbeamtech.com/PRODUCTS/...0/_MG_4695.jpg
I'm still not sure I'd like to control a water cooling setup via processor limits, but it might work and this would be a fairly simple way to make ordinary fans programmable.
I've had one of the older 4 channel sunbeams running for over 2 years straight now, so I've got some comfort with their controllers and liked the 0-12V range the old one provides.
If this works the way I think it does, I have to say: Genius. Eliminating the need for a seperate PWM module (ie a 555 timer) by using the PWM signal already used by the motherboard. The only thing I miss would be the possibility to control each channel seperately, but still based on the PWM signal of the motherboard. Still, it's nice to be able to use the motherboard to control more than one or two fans.
I found this a minute ago:
http://www.techreaction.net/2010/12/...an-controller/
This leads me to assume it is voltage regulation "VR" output:
http://www.techreaction.net/wp-conte...12/MG_2054.jpg
I would like to buy one to try, but I'm not seeing them anywhere yet.
It is selectable either pwm controlled or manual on each channel and
Should be released in shops in January (source: http://www.facebook.com/Sunbeamtech )
Thanks for pointing this out Martin,Quote:
Originally Posted by Martinm210
Sounds close to what I was describing a few posts back as 'fan control nirvana'! :D
It would be perfect but for the flaws already pointed out, and the fact that it must sit in a bay.
I don't really need the manual control :(
I hope mCubed makes a T-balancer similar to it, but without the need to mount in a bay etc.
Why isn't there something out there that suits my desires goddamit!? :)
Damn, it looks really good. PWM signal ensures no extra noise when undervolted, and it's fully hardware-controllable.Quote:
Originally Posted by Martinm210
Just hope it's not overpriced and I might pick one up! :up:
might come up with something interesting. design and prototypes of parts of the circuit are already up and running. just need to put all of this together.
as it will be microcontroller (PIC) based there is almost no limit. a few ideas i have in mind:
- connected to the system via usb and controlled by software
- fans could be controlled via voltage regulation or PWM, though my testing shows using PWM on 3-pin fans has some limitations. so i recommend using PWM only for real PWM (4-pin) fans
- fanspeed control either manual, related to any temperature readable by software or even controlled by motherboard fan headers
- regulation of fanspeed to target defined rpm, voltage or percentage if max speed
- able communicate with rivatuner hardwaremonitoring
- each channel will be capable of handling about 1.5A max in standard config and about 3A in high power config. keep in mind, even 1.5A are a total overkill as the most demanding deltas tested by martin will require not more than 0.8A!
- open for any ideas coming from the comunity
- no fancy look. will be some sort of a black box to be mounted elsewhere in the case AND will require a limited amount of airflow if high power fans are used
this is just a quick info with a few of the feature i plan to pack into it. will open a new thread when i have more to say ...
folks, give me another couple of weeks. was on travel the last few weeks so my project got delayed.
I would definitely be interested in hearing more about this!Quote:
Originally Posted by fgw
Not sure how you're going to pull-off some of the things you're suggesting, but so far it sounds pretty good "in-theory".
I've got a thread going here to determine if my MB is sufficient as a fan controller...
But also to determine if there's a dedicated controller out there that can meet my demanding needs, when I decide to ditch my MB in a few months.
Be great if you could share your plans there, or add your thoughts to my/others Qns?!
Be sure to let us all know when your dedicated thread's up!
Sounds like something like Aquaero/BigNG/TMS-200/Heatmaster. Is it worth to DIY such?
Nice!Quote:
Originally Posted by fgw
I look forward to it:up:
Here are my 2C on my own personal ideal fan controller. I would like a controller for 3 pin fans (complete compatibility with all fans) in the form of voltage regulation (superior for noise), that is controllable via temperature monitoring of water temperature. Ideally, it would be nice to have the ability to set both a lower and upper fan voltage and temperature. If someone wanted to go a step further, it would be nice if there was an LCD indicating current temperature and what the lower and upper ramp up limits were. I would also prefer this to all operate analog (not dependent on PC software).
Unfortunately the PWM sunbeam controller will only work for CPU temp, which may work ok, but I think for optimal smooth ramping up and down, it would be better(Less annoying sudden change in fan speed) to ramp up/down via water temperature.:up:
Sounds ideal to me, and simple really, sometimes thats best:up:
At least my Gigabyte GA-EP45-UD3 board requires using Easy Tune 6 to define how PWM control is adjusted, automatic settings adjust duty cycle too high. This is how my cpu fan header controls an Akasa Viper (rpm range 600 - 1900) when using my own settings, auto settings never let fan go below 1000 rpm.Quote:
Originally Posted by jalyst
I would guess they purposely do this prevent accidentally turning the fan down too much and overheating.:shrug:Quote:
Originally Posted by jalyst
Why not get the 3000 rpm version, that should get down there w/mobo control?Quote:
Originally Posted by jalyst
FWIW, the folks over at cystalfontz say this about PWM minimums on their 3 pin PWM fan controller:
Although they use a different type of PWM (also 3 pin), I can actually feel the fan kick on and off with their controller at lower settings. Anyhow, apparently there is at least some thought that low PWM is also not good for the fan. Perhaps low voltage regulation is no better for that either, but voltage is better for sound quality from the little testing I've tried.Quote:
Limiting the minimum PWM duty cycle to 30% or 40% should reduce the mechanical and electrical stresses in the fan, avoiding premature failure.
I personally would rather get away from software all together and have an analog solution that uses voltage regulation. Anyone with multiple loops would probably want one control setup for each and may or may not have more than one PWM MB header and may or may not want to mess with extra software and background tasks to control that. I wouldn't mind if something could be programmed and shut down late, but I wouldn't like have to keep a process like easytune running in the background all the time.