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Overclocking on GA-880GM-D2H

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September 1, 2012 3:21:48 PM

OK so i have some problem finding a guide on how to overclock on my mobo and i don't want to mess with anything so can someone please help me? i want to overclock to 4.5 (i know, i should take small steps) so if anyone know a guide, or had experience with this mobo before, i'll be more than happy to have your help!

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September 1, 2012 7:33:51 PM

seriously? nobody knows?
c'mone people, you're my last hope!
a c 78 à CPUs
a b K Overclocking
September 1, 2012 9:01:29 PM

What CPU do you have?
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September 2, 2012 12:47:21 PM

oh yeah! i'v got an FX-4100
a c 78 à CPUs
a b K Overclocking
September 3, 2012 11:59:12 AM

Gigabyte lists your MB as AM3 and Newegg lists it as AM3+. If you already have the CPU installed and running, it's probably an AM3+. (Looks like revision 3.1 is AM3+ in the reviews)

The CPU support list includes a 125w TDP processor so Gigabyte thinks the Socket is good up to 125w. Your VRM section doesn't look particularly robust, so I wouldn't push far beyond 125w.

I posted some info about overclocking this chip on a 125w socket in another thread. Here's a couple cut and paste(s) that should help you.

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These things pull a lot of power once you OC them and your board's VRM section looks less beefy than it probably needs to be for 4.5 Ghz



It's rated at 125 TDP and the 4100 is rated at 95w with stock speeds.


Using this equation:


OC Wattage = TDP x ( OC MHz / Stock MHz) x ( OC Vcore / Stock Vcore )^2


And these guesstimates:


A) ~1.424v to reach 4.5Ghz
B) ~1.35 stock vcore
C) 3.3Ghz is the real stock clock due to APM throttling the CPU during prolonged heavy loads.
D) You have a BIOS version that can disable APM for your OC.


Your new CPU wattage @ 4.5 Ghz will be 144w


Using the same equation and a clock speed of 4Ghz and a vcore of 1.4v, your CPU wattage will be about 124w


If you can go faster with less voltage, you can stay below the 125w mark.





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I tested the 4100 I OC'ed with the stock cooler and found that it gets rather hot when it's bone stock.


I used a TX3 for the one I overclocked.


CPU-Z will tell you voltages.


HWmonitor can show you CPU temps


And prime 95 can stress test your CPU to find out just how hot it will get under full load.


The trick is to go as fast as you can while keeping stable, with the least amount of voltage and heat.


As you increase your speed, most motherboards will increase voltage automatically. You have to keep an eye on the voltage to make sure it's not too high after you bump speed. I stayed below 1.40x IIRC and reached 4.4 Ghz.


If the voltage gets too high, try using a negative offset. (in the BIOS)


If the OC is unstable and you need more voltage, try a positive offset, or LLC adjustment. (again, in the BIOS)



Also, there is a function called APM (advanced power management or something like that)


It causes the chip to throttle to a slower speed under full load and pretty much defeats part of your OC.


Older motherboards don't even show the function in the BIOS, but most offer a BIOS update (My UD3 needed version F8) to show this function and give you the ability to disable it.


...........................................................................


You will find different recommended max temps for this chip, I just kept temps below 60C. (That's a conservative temp limit from what I've read though)


September 3, 2012 3:13:08 PM

thank you!
a c 78 à CPUs
a b K Overclocking
September 3, 2012 4:07:00 PM

Your welcome.
September 3, 2012 5:49:37 PM

wait, let me get this straight:
in order to get to 4.5 (which is the most recommended for my MOBO(?)) i need to set the voltage to 1.424v, and with the stock cool it will not over-heat? and that's it? sorry, i just didn't understand very well....
a c 78 à CPUs
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September 3, 2012 6:46:07 PM

It will most certainly overheat with a voltage of 1.424. You will need a better cooler for sure. (I mentioned the TX3 in the cut and paste, but there are many options available on the market)

Your stock cooler is only designed to dissipate 95w and your CPU will be at about 144w if you overclock with the guesstimates I listed.

Due to your not-so-stout VRM section, I wouldn't go past 125w with the overclock.

My listing of the 4.5 OC wattage was simply demonstrating the kind of strain you would put on your system if you went that high. (I wouldn't recommend putting your board through that strain because it doesn't look like it could handle it well.)



September 4, 2012 2:53:12 PM

OK... so basically what is the highest OC option I have right now without burning down my MOBO and buy a new cooler?

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September 4, 2012 3:07:16 PM
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Stock cooler is only good for 95w. So use the formula listed above to give you an idea of your options for that cooler. (Go a little faster with a little less voltage)

Use testing to make sure your temps stay below 65C under load.


If you buy a better cooler, you will be able to add some voltage and more speed. Again, use the formula above to stay around or below 125w, because that's what your board is rated at. And use testing to make sure the new cooler keeps your temps below 65C under load.



September 16, 2012 9:37:34 PM

Best answer selected by Avinoam73.
!