Athlon x4 750k undervolting on Gigabyte GA-F2A88XM-D3H

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germanch90

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Hello, I recently put together a new computer for my brother. The processor is an Athlon x4 750k, and the MoBo an GIGABYTE GA-F2A88XM-D3H. It runs at stock clocks and voltage, though when working heavily the cpu fan starts to spin really fast and temperature raises to 51-55 °C, stock HSF is used.

I wanted to lower the Vcore, as it seems to be around 1.4V, so I think there might be room for improvement. When trying to do it from BIOS, I see no option to lower the voltage, only to increase it.

Any advice or alternative method?

Thank you for your time.
 
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germanch90

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Thank you for you quick answer, but entering M.I.T.>Advanced Voltage Config.>CPU Vcore only lest's me set it to auto, normal or +0.000V to +0.300V. I have not found a way to make the offset a negative number for reducing the Vcore.
 
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germanch90

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It is indeed UEFI, but as I mentioned the only place there is an option for changing CPU Vcore in the BIOS let's me change it to normal or positive values up to 0.300, but I need negative values. Temperature seems to change really fast too.
 
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Wisecracker

Wisecracker

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It's like ... the Twilight Zone ... :ouch:
GB_FM2-plus_Bios_0.png


I can go as low as 0.8v.

I simply used the 'Page-Up' key to bring the volts down.

 
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germanch90

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Yeah! It's driving me crazy, my menu looks a little different. BTW I updated to F6 version of BIOS.

140610100553.png


Whenever I set a value higher than 0.300 it resets to Auto. And if I set something like +0.012 it raises the Vcore to 1.440 V, from 1.428 V it was previously set, so it's working with just positive offsets, pressing PageDown turns at max takes it to Auto.

Don't know what else to do! :/
 
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Wisecracker

Wisecracker

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Have you tried AMD OverDrive ?

Maybe you can dial-back the VCore slider in AOD and set it as boot voltage. It will also give you the new AMD *Thermal Margin* for your CPU temps.

I'm running 4.6GHz and my 'sink hardly gets warm (using an old original Phenom copper-heatpipe cooler)

 
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germanch90

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Hello! I finally managed to lower the voltages, though I had to use AMD Overdrive. My temps were around 60°C and my cpu fan was screaming loud, with a fast tweak of Vcore and had to make sure to adjust Vcore for turbo core too, temps dropped to 48°C. There's still a lot of room for improvement :)

Thank you Wisecracker for all your advise. Though I don't think I will come back to buying a Gigabyte MoBo in the future, I've had 2 asus MoBos which I've never had any trouble, and to me Gigabyte products (HW/SW) have always looked cheap and look like designed 10 years ago. But that's my personal opinion. I decided to buy this one as it had a decent chipset, was cheap and had overall good user feedback. At least it works :p

Vid.png


Edit: Haha that was exactly what I was testing, I read your mind :B
Edit2: What voltages are you using for your frequencies? You have an Athlon x4 750k, right?
 
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Wisecracker

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Yup ... Athlon X4 750K.

It runs 1.4v -- 1.45v VCore 'Thermal Margin' around 19-20C.
1.25v NB Volts at 2500MHz, with GSkill 2400MHz RAMs
(This boosted my memory bandwidth by 20% over default)

At 4.6GHz -- 1.4v I noticed a little core-throttling in stress-testing, so I bumped up to 1.425v and knocked most of it out. 1.45v eliminated all of it.

I run C&Q -- on the low-end I'm not 100% certain but I thinks it's in the 0.925v range. I have not spent a great deal of time under-volting, but will get around to it :)

It's a great little CPU. I've got it paired with a Kingston SSD on the GB A88X ITX WiFi with an XFX HD 7870 DD.

GB is normally great with BIOS updates. Fire off an email to 'em and see if they have a beta BIOS for your board. It's crazy we both have A88X and you don't have the expanded menu options.

I was a little worried about the 2400MHz RAMs but I bumped the memory volts to 1.6v (GSkill spec), selected the first XMP profile, and have not touched it since.

 
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