Rampage IV Extreme PCH Fan

[AmdTactical]

Hello everyone,

New to the ROG forums, would like to say "hi" and thank you ahead of time.

Alright so let me give you guys a bit of some background info, I have a Rampage IV Extreme along with an I7 4930K, installed everything. Upon first initial boot, PC would NOT POST. CPU LED was solid red, called up asus tech support, and they asked me to download a new Bios that supports that chipset. All is well now, pass post and have already begun installing windows and drivers etc..

However I noticed that the PCH fan is NO longer spinning. And before it was, by before I mean when my PC would not past post, However after flashing Bios 4206, I Think that's when it stopped. (Not 100% sure though) I've already pushed the connector and all is well with the connection of the PCH fan looks good.

I've been reading, and there appears to be another BIOS version before. "4206" that "fixes" this PCH fan issue. My question is IF I flash my BIOS again with that older version, will it overwrite the flash of 4206? Causing it to give me another CPU LED error? Or are these BIOS flashing adding to it rather than overwriting?

My apologies, for the long explanations. Hopefully someone can help me out with those questions as soon as possible, as I AM running the PC without that PCH fan spinning at the moment, (Not playing any games though)

[Delitus]

Hi, the PCH fan does in fact work even on these newer BIOSes, but the default behaviour has changed; when you have PCH fan control enabled, the fan will remain off until the PCH temperature becomes hot enough to require cooling. If you would prefer to have the fan always spinning for the best thermal performance, then try disabling PCH fan control.

[Arne_Saknussemm]

You need the latest BIOS for that CPU so don't flash back to an older BIOS. The PCH fan is really little more than decoration on the RIVE; the PCH chip will not get hot in a case with normal airflow....the fan doesn't really need to spin up unless it gets to 80-something degrees. The later BIOS simply reflects this and leaves the fan off. If you want the fan to spin and do so quietly set user mode and select min temp 40 degrees.

[AmdTactical]

Thank you guys for the quick replys I appreciate it. If you guys say it's no big deal, I will leave it alone. Thank you.

[HiVizMan]

It is not a big deal the fans will spin up if your PCH gets hot enough. I have personally tested this.

[martyn]

getting pch temp warnings exceeding 60c last few days, think after reading will go into bios and set 40c spin as Arne suggested, hopefully then to stay below threshold of warnings.

[HiVizMan]

The fan is set to spin up in bios when it gets to 80'c by the way.

[martyn]

HiVizMan - aware of that from an earlier post mate that i read on here someplace, but, here is the reality of changing it.

On Bios 4206 - Last for my chip series

I rebooted and went straight to the bios and the fan settings, drop down menu gave plenty of choices, thumbs up Asus, decided i would select user having checked others first, one gave a silent option, anyhow, selected user and up popped the settings already entered 25c spin start and 100% at 60c, figured go with the flow and try this, saved f10 and restarted, as comp fired up, things popped up as usual on my toolbar to show loaded and as it did so gradually the already ramped fans started to slow, cpu temp dropped also - now running few degrees cooler but most importantly, so much quieter - pch fan now 50c and still dropping slowly.

For me, a huge improvement, note i have a closed loop liquid cooler. Last night i shut my PC off, i didn't wish to listen to the racket, this is now useable, and still dropping fan speeds/noise slowly. RealTemp GT reports lower core temps generally as i said by few degrees. Will stick with this for now in the heat and monitor it.

Comments and thoughts appreciated if you have any

[HiVizMan]

Noise was the reason why they changed the upper limit, as some users have complained how noisy it was. Now the chip works just fine at a slightly elevated temp. Not sure how that temp would be impacted in your situation with so much watercooling. I only have my CPU WC'd but I have outstanding air flow in my case. It is a big thing for me, I use my vid camera which allows me to do infra-red to identify hot spots.

[WillyK]

I'm using full WC on my R4E, CPU/GPU/RAM and the MoBo (MOS/PCH), and I've been very happy with pretty quiet PC and MoBo temps below 35 C degrees ever since day 1. Worthwhile the investment in my opinion.