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post #531 of 1039
Hi I'm running 4 EFB1212HHF rated for 3800rpm at 60% PWM from a 555 timer at 300hz.

The fans click a lot and they still click when I use PWM from my mobo.

Would I benefit from running the PWM at higher frequencies?

For reference, Delta supports 30hz - 31khz PWM signals.
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post #532 of 1039
Thread Starter 
Quote:
Originally Posted by TheLAWNOOB View Post

Hi I'm running 4 EFB1212HHF rated for 3800rpm at 60% PWM from a 555 timer at 300hz.

The fans click a lot and they still click when I use PWM from my mobo.

Would I benefit from running the PWM at higher frequencies?

For reference, Delta supports 30hz - 31khz PWM signals.
I honestly don't know, but I can see the logic in using a higher frequency shorter pulse. I have no experience in design and experimentation in PWM control, but is there a 'sweet spot' of freq / pulse that allows the best high and low speed control / power?
post #533 of 1039
I have no idea about the sweet spot.

Most fans recommend 18khz-25khz.

Delta didn't say anything about optimal frequencies and couldn't find anything online.

I'll try different frequencies.
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post #534 of 1039
Thread Starter 
Sounds like a plan. Please let me know what you learn. Would be nice to figure out a way to stop the clicking. tongue.gif
post #535 of 1039
Going from 300hz to 32khz made the clicking more consistent.

The loudness of the clicks are the same but 32khz made the click sounds much smoother.

It clicks even at 80% pwm.

I give up.
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post #536 of 1039
Thread Starter 
Maybe it's the moral highground-effect? tongue.gif
Sorry, couldn't resist. blushsmiley.gif
post #537 of 1039
Everything is put together. I couldn't use the short cable kit, it was too short. I am going to get a 24 pin extension to match the blue 8 pin you can see at the top, that way everything will be sleeved. The fans I put in the front are a little loud, but the good news is the system never gets louder than that. The heatsink fans don't have to spin up at all to keep things cool on the card or the processor, and the processor temps dropped by a good 5 ish degrees under load and the card 2-4 degrees under the 80c throttling limit. The back of the case is very open, and heat just seems to flow out easily.

Sorry for the bad lighting in a few, it was dark by the time I got everything hooked up:






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post #538 of 1039
Thread Starter 
Quote:
Originally Posted by .theMetal View Post

Everything is put together. I couldn't use the short cable kit, it was too short. I am going to get a 24 pin extension to match the blue 8 pin you can see at the top, that way everything will be sleeved. The fans I put in the front are a little loud, but the good news is the system never gets louder than that. The heatsink fans don't have to spin up at all to keep things cool on the card or the processor, and the processor temps dropped by a good 5 ish degrees under load and the card 2-4 degrees under the 80c throttling limit. The back of the case is very open, and heat just seems to flow out easily.
Warning: Spoiler! (Click to show)
Sorry for the bad lighting in a few, it was dark by the time I got everything hooked up:






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Looking good. thumb.gif
Does removing the front improve temps? Just curious, because if it does it's an indication the front fans are not doing a good job.
Did you try using stock PH-F200SP? The Fractal fan is weak a best, not sure of
post #539 of 1039
Quote:
Originally Posted by doyll View Post

Looking good. thumb.gif
Does removing the front improve temps? Just curious, because if it does it's an indication the front fans are not doing a good job.
Did you try using stock PH-F200SP? The Fractal fan is weak a best, not sure of

Thanks! Here is some testing. I ran them all with the air conditioning on, so it's probably around 22-23c in the house I ran the 3dmark firestrike demo once per test, then just took screen's of the temps.

You can see from the tests the panel is very restrictive. Things I noticed, with the big fan and the panel installed, the phanteks heatsink fans had to spin up quite a bit. All of the other tests did not. Without the panel, the 2 140's were VERY loud, it blocks out a lot of sound. I think I'm going to try to mod it to stick out a little further so more air can get in to the fans. The big phanteks fan is very quiet, it is almost inaudible.

Here is the PH-F200SP with the front panel:


Here it is without:



Now here is the two 140's with the front panel:


and without:
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post #540 of 1039
@doyll, I transferred my build to a new case and I am wondering if you could share some of your expertise.





CPU cooler is nh-c14s with eloop b14-ps exhausting air on top vent.



I have 2x silent wings 2 as front intake. I can have them run 100% and still silent but it seems not enough.

Should I replace them with a high static pressure fan like gentle typhoon, vardar, or venturi hp?

If ty-143 had a 120mm version, that would be great.
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