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scythe gentle typhoon 5400rpm or bgears fan - Page 4

post #31 of 33
Quote:
Originally Posted by OPanda View Post

Personally, I will always choose a thicker rad over a thicker fan. I've no doubt the San Ace and Panaflo fans are great but I doubt they're that great... At least definitely not great enough outperform a thicker radiator paired with a slightly inferior and much thinner 25mm Gentle Typhoon at similar RPMs.
Wait, what? That's exactly the case with thick radiators; thicker fans WILL perform better on thicker rads at the same RPM. Unfortunately, relevant testing is hard to come by anymore... fan-on-rad tests these days annoyingly almost all happen with thin Magicool derivatives, which yields diminishing returns faster with thicker fans because the rad just isn't letting the fan show its stuff.
Quote:
Originally Posted by huhh View Post

It also depends on how much your undervolting them, if I went below 7v the fan were pretty quiet but would not start up without 7v from a shut down. Having to reset my fan controller to start the fans then back down is annoying. I gave up on using 38mm fans last year, too much bull.
Having the startup voltage higher than the shutdown voltage is a universal trait among fans, and pretty much anything with a motor. It's not really fair to single them out for that.
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post #32 of 33
Quote:
Originally Posted by Chunky_Chimp View Post

Having the startup voltage higher than the shutdown voltage is a universal trait among fans, and pretty much anything with a motor. It's not really fair to single them out for that.

Sure I can, It's a "Con" of using a 38mm high speed fan on a fan controller. Another universal trait amongst fans is the larger the motor the larger the distance between starting and stopping voltages. You can literally turn a AP-15 to where it's completely silent and still be above the starting voltage. It's completely fair to single them out for that. I've gone down the whole 38mm fan road before...
Edited by huhh - 7/3/13 at 5:05pm
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post #33 of 33
Quote:
Originally Posted by Chunky_Chimp View Post

Wait, what? That's exactly the case with thick radiators; thicker fans WILL perform better on thicker rads at the same RPM.

Isn't that what I said? And wouldn't 38mm fans perform better than 25mm fans regardless of rad thickness?
Quote:
38mm fans are superior to 25mm fans (with same size rads anyway) in terms of raw performance, no argument here.
Quote:
Of course, if you have enough room for a Monsta and some 38s, go for it!

I guess my wording and examples weren't very clear. I'll try again.

Same RPM:
1. 30mm rad + 38mm fan < 45mm rad + 25mm fan (+2mm)
2. 45mm rad + 38mm fan < 60mm rad + 25mm fan (+2mm)
3. 60mm rad + 38mm fan < 80mm rad + 25mm fan (+7mm)
4. 80mm rad + 38mm fan > 80mm rad + 25mm fan
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