Just bought a gtx 980 classified,questions about overclocking?

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ERIC J

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Jan 14, 2014
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Finally got the EVGA 980 classified i have been wanting.
I wanted to ask, these really dont need to be manually overclocked but IF i did decide
to try to add to the core do i have to mess with the voltage?
the classified cards are different, they offer three settings(BIOS)
and i am having trouble understanding this?
Some said the BIOS has to be custom flashed??? I am lost!
anyone here own one of these?

 
Solution
17seconds
For starters, it's probably best to leave the voltage alone. The reason is that Nvidia's Turbo Boost 2.0 relies upon a temperature target as it's key variable. Overclocking and turbo boosts are partially limited by the temperature target (check the "Temp Limit" variable in PrecisionX or Afterburner). Adding more voltage often has an inverse effect, since it causes the GPU to heat up quicker and reach its Temp Limit quicker.

The best way to begin with your overclocking experiments is to increase the Power Limit to max, increase the core clock and/or memory speed, and then adjust the Temp Limit slightly higher. See what happens. Within PrecisionX or Afterburner, you'll have various readings that will tell you where your overclock is...
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17seconds

17seconds

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For starters, it's probably best to leave the voltage alone. The reason is that Nvidia's Turbo Boost 2.0 relies upon a temperature target as it's key variable. Overclocking and turbo boosts are partially limited by the temperature target (check the "Temp Limit" variable in PrecisionX or Afterburner). Adding more voltage often has an inverse effect, since it causes the GPU to heat up quicker and reach its Temp Limit quicker.

The best way to begin with your overclocking experiments is to increase the Power Limit to max, increase the core clock and/or memory speed, and then adjust the Temp Limit slightly higher. See what happens. Within PrecisionX or Afterburner, you'll have various readings that will tell you where your overclock is being limited. Check: Temp limit, Power limit, Voltage limit, and OV max limit. These will give the value '0' if they are within their limit, or '1' if they have reached their limit. Use that information to decide what needs to be adjusted for an even higher overclock.

At that point, if the Voltage limit variable shows a 1, then go ahead and increase that. Chances are it'll be the Temp or Power holding you back.

Don't worry about any custom BIOS installations. EVGA knows what they are doing and delivered a card fully capable as-is.
 
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Solution
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ERIC J

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Jan 14, 2014
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Wow thanks! you answered everything i needed to know in one reply!
I am actually glad i wont have to mess with the voltage.
I use afterburner because i like their on screen display options for gpu temp,vram usage,etc,etc.
I set the power limit to max on afterburner.
right now the card is getting 1430 mhz (boost) without even touching the core?
that is high for out of the box! I may not even have to oc this card?
 
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17seconds

17seconds

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Just check that when you set the Power limit at maximum, it is coupled with the Temp limit. So your Temp limit also increased to maximum. You can unlink them, or leave the high (95c?) Temp limit. If you leave it, just be aware that there's no limit. Your ACX cooler should do its job and keep things well below the 80c's.

Now that you understand the limits, you can up your core and/or memory clocks to fill up that thermal overhead. Or you can just let Turbo Boost 2.0 do the job for you. Good luck!
 
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ERIC J

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Thanks for all the help! ironically i am seeing this classified getting 1450+ mhz (reference 980's are 1216mgz!)without any oc applied so i think i will leave well enough alone. temps are under 70 degrees while gaming
it really is as much of a beast as i read it was! :eek:
 
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