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Help with OC'ing GTX 780Ti SC edition w/ACX?

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March 31, 2014 4:18:37 PM

Alright, but can anyone come help me with Overclocking? Since I always have trouble OC'ing my card. I can do some stable Overclocks, but most of the OC'ing skills lead to unstable OC, I test via valley. So yea can anyone help me or teach me how to make a stable OC? I never raise the voltage, could that be the reason?
a c 163 K Overclocking
March 31, 2014 4:45:30 PM

The SC will put a bit of a damper on things as SC historically could just as well stand for "same card". Haven't confirmed for the 780 Ti but through the 5xx, 6xx an 7xx series, the SC version of the card is the exact same as the nVidia reference version. It has a factory OC and nice cooler, but the PCB and VRM is the same as the reference card. The competition from Giganyte, MSI for example, uses a custom PCB and beefed up multi-phase VRM to spread out the load over more phases.

The EVGA Classified and Lightning are very tweakable and robust cards and carry an associated price premium. In between for the same price or thereabout as the reference cards, we have the Asus DCII, Gigabyte Windforce and MSI Gaming Series cards which, due to their custom PCBs and better VRMs, run cooler and, in my experience, are able to get higher OCs

As for accomplishing an OC, download one of the tweaking programs (EVGA Precision, Asus TweakIt, MSI Afterburner) and have ago.
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March 31, 2014 5:07:34 PM

JackNaylorPE said:
The SC will put a bit of a damper on things as SC historically could just as well stand for "same card". Haven't confirmed for the 780 Ti but through the 5xx, 6xx an 7xx series, the SC version of the card is the exact same as the nVidia reference version. It has a factory OC and nice cooler, but the PCB and VRM is the same as the reference card. The competition from Giganyte, MSI for example, uses a custom PCB and beefed up multi-phase VRM to spread out the load over more phases.

The EVGA Classified and Lightning are very tweakable and robust cards and carry an associated price premium. In between for the same price or thereabout as the reference cards, we have the Asus DCII, Gigabyte Windforce and MSI Gaming Series cards which, due to their custom PCBs and better VRMs, run cooler and, in my experience, are able to get higher OCs

As for accomplishing an OC, download one of the tweaking programs (EVGA Precision, Asus TweakIt, MSI Afterburner) and have ago.


Thanks for the reply, but I already have EVGA Precision X, I just need to learn how to make a high enough stable OC. Would I need to raise the voltage? If so, by how much?


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April 23, 2014 5:50:47 PM

I am fairly new to overclocking myself, but I have read a lot of information on how to overclock and the things you need to look out for. The first thing is you want to slowly increase clock speed, memory clock and see where the system is stable. You can also increase voltage, but it depends some cards have a locked voltage, so you won't be able to increase it any more then the amount listed in evga precision. If you look up some guides on your card, i'm sure you will find some good guides. You just have to go slow, and test after every overclock to check for stability.
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a c 163 K Overclocking
April 25, 2014 7:49:21 PM

Yussefoh said:
Thanks for the reply, but I already have EVGA Precision X, I just need to learn how to make a high enough stable OC. Would I need to raise the voltage? If so, by how much ?


What you "have" is irrelevant. MSI Afterburner and Asus Tweak It are the same price (free) as Precision X and you do not have to have a utility from the same manufacturer as your video card. The are all basically "branded" versions of "Riva Tuner". Afterburner is generally considered the "best of the bunch" so when you ask for help, in forums you are likely to get directions on how to do it in AB.

Voltage used to be an issue of concern with older cards but nVidia 's built in protection limits now make it impossible without specially altered cards (i.e. MSI Lightning / EVGA Classified) to hurt their cards. When I OC'd my Asus DCII 780s, I opened up AB, set voltage to max, set limits to Temperature (not power) and started inching up the Core speed, starting at + 100 and then increasing in increments of +25 till I saw artifacts or instabilities. Then I'd back down in smaller increments till I saw no issues. That done I started with memory on the same manner.....got all the way up to +608 and was stable in all the benchies but wound up tuning it down as was not stable in some games.....Metroi2033 would lock up at same point in game.... and BF4 would crash every 15 minutes. So after each problem knocked it down a notch till problems ceased. Wound up with +25% OC on the core and +20% OC on the memory.

If ya need some targets, hop over to Guru3D and see how lucky they got with their EVGA SC ACX

http://www.guru3d.com/articles_pages/evga_geforce_gtx_7...

Here's their settings:

Quote:
Power Target 106%
Priority at Temperature target
Temp Target 95 Degrees C
Core clock +115 MHz
Mem clock +275 MHz
Voltage +37 Mv


Mine are (water cooled)

Power Target 110%
Priority at Temperature target
Temp Target 95 Degrees C
Core clock +200 MHz
Mem clock +594 MHz
Voltage +37

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