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Old October 21, 2014, 07:01 AM
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Default PWM fan headers on Z97 mobos

So, after buying everything but the important stuff, I'm on the hunt for a z97 mobo. I'd like to control all my fans via PWM if possible.

I did some digging and found that apparently there's some controversy regarding "fake" 4 pin headers not actually being PWM. So far, only Asus Z97 boards have been found to be all PWM controlled.

Does anyone know of any other boards with lots of PWM headers?

Thanks!
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Old October 21, 2014, 12:04 PM
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This is the first I have heard about 4-pin headers not being PWM controlled. Frankly, it doesn't make any sense to soldier on a 4-pin connector and use only 3 traces to power the connector (unless you're MSI, and I won't go there...). If you read a 'supposed' thread on LTT about someone's rant, that poster is completely misguided on how PWM works. AFAIK, there is no controversy and that person is full of FUD. All my 4-pin connectors on my ASRock Z97 Extreme4 are PWM controlled.
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Old October 21, 2014, 07:55 PM
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Quote:
Originally Posted by Helios79 View Post
This is the first I have heard about 4-pin headers not being PWM controlled. Frankly, it doesn't make any sense to soldier on a 4-pin connector and use only 3 traces to power the connector (unless you're MSI, and I won't go there...). If you read a 'supposed' thread on LTT about someone's rant, that poster is completely misguided on how PWM works. AFAIK, there is no controversy and that person is full of FUD. All my 4-pin connectors on my ASRock Z97 Extreme4 are PWM controlled.
I'm afraid it's not FUD.

All of the manufacturers do it. It's not just MSI.

Give this thread a good read:
SPCR ? View topic - ASUS Z87-Deluxe fake 4-pin headers & other fan control info

Each generation motherboard makers are different. Some offer better controls one generation, then actually regress the next generation. It's really weird.
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Old October 21, 2014, 09:05 PM
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Well, it's nice to know that someone did take the time to properly explain on why ASUS chose to do what they did, instead of someone else posting a rant without providing any real technical evidence. I guess I'll have to start looking at the traces on new motherboards.
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Antec 300 | ToughPower 700W | GA-Z77X-UD3H | i5 3450 | Hyper T4 | 8GB PC3-10600 | X25-V 40GB | Seagate 3TB 7200.14 | WDC Blue 3TB | Seagate 2TB 7200.14 | Server 2012 R2 Standard
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