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Questions about GIGABYTE products => Motherboards with Intel processors => Topic started by: smoothchat on July 09, 2014, 02:18:18 pm

Title: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: smoothchat on July 09, 2014, 02:18:18 pm

Hi.  Using the Optimised Defaults on the Gigabyte Z97-HD3 board results in a vCore of 1.392v for the 4790K.  Is this normal ??

I believe I was running far too hot  (80C +) on stress tests. (Using a Corsair H60 cooler)

I manually dropped the vCore down to 1.25v after fiddling with the offset values and it runs everything fine at 50-60C max now.

Like I said, optimised defaults set a 1.392v vCore.  Am I wrong in thinking that is way too high for stock speeds?

Just wondering if I should advise gigabyte.

Title: Re: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: smoothchat on July 09, 2014, 08:53:13 pm

Further to my post above,  the advanced voltage area of my bios strangely reports a 1.100v  vCore to which I add 0.054v offset to get a reported 1.248v on the bios main status screen ??.             Perhaps I am fighting against the chip's dynamic voltage controller.

Ultimately though, this setting has pegged the maximum voltage to 1.248v.  Gigabyte's System Info Viewer reports a vCore of 1.2 which drops to 1.88v at maximum 8 thread load and 4200mHz speed. 

Confusing stuff. But this setting knocks about 20C off the temps, so I am happy.

Title: Re: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: ex58 on July 09, 2014, 09:09:19 pm

For problem with high default vCore with stock 4790K......reflash board with latest BIOS...for your board F5.
http://www.gigabyte.com/products/product-page.aspx?pid=4955#bios

or on TT forum you have already F6:
http://forums.tweaktown.com/gigabyte/28441-gigabyte-latest-beta-bios.html

Title: Re: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: smoothchat on July 10, 2014, 12:22:16 am

Thanks for the info.  

I need to be sure that it is a "known issue" that has been fixed for my BIOS before I risk flashing it.

As it is, I am happier with the temperatures now.  I still can't find any definitive info on what should be the stock voltage at 4400mHz. I'm just assuming 1.25v.

Title: Re: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: smoothchat on July 10, 2014, 06:21:09 am

Took the plunge and updated the BIOS to F5. 

BIOS still thinks it's a 4770K, but now sets the vClock to 1.88v !!  That's a massive drop from 1.392v in the previous BIOS (F4)

Prime95 temps around 55C now.

Title: Re: High default vCore with stock 4790K and Z97-HD3 (1.392v)
Post by: ex58 on July 10, 2014, 09:14:21 am

Quote from: smoothchat on July 10, 2014, 06:21:09 am

Took the plunge and updated the BIOS to F5. 

BIOS still thinks it's a 4770K, but now sets the vClock to 1.88v !!  That's a massive drop from 1.392v in the previous BIOS (F4)

Prime95 temps around 55C now.

You mean 1.188V...not 1.88V?