Overclocking gtx 780, I have some (a lot of) questions

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Pauuuuulix

Pauuuuulix

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Jun 19, 2014
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Hello community!
I finally decided to step in to overclocking bussiness. I have MSI Gtx 780 gaming something edition, with TF IV cooler. First off I was stunned to find out that my default clock was 1241mhz (3004 on memory). I started off with testing my card in Unigine Heaven in DX 11, Ultra quality, Extreme tesselation, next two things disabled, AA 8x and full screen at 2560x1080 res. Got a decent 43.4 fps/1093 score. Then I had a look at MSI Afterburner. Here are the changes:
Core Voltage +10 (just to add something to it)
Power limit +101
Temo. limit 85
Core clock +59 (to get a nice rounded 1300mhz)
mem. clock + 410 (because I saw this number in some review)
New test showed 47.9fps/1206 score with max temp. 77 (earler was 76). I could see no artifacts at all. In reviews they clock a lot less and it bothers me for some reason, because I don't want it to be unstable or something. Here comes the questions:
What on earth is Core Voltage for? I have never understoond, I know it allows for deeper overclocking and makes it more stable.
What is Power limit for?
Are these settings okay?
Should I change something?
Should I clock even further? Maybe memory?
Is there anything unsafe about these clocks?
Why was my default 1241mhz, it should be somewhat around 900 and 1000.
Anything you want to roast me for doing something very wrong, let it all come.

Thank you for everything,
Paul
 
Solution
Ne0Wolf7
http://www.tomshardware.com/faq/id-2749337/safe-gpu-overclocking-guide-2016.html
Everything you need to know.
The way your doing it, with the core voltage, is fine, you can even slide it all the way to the right without lowing your cards life at all. Power limit evidently limits the power you can put at your cards. Again, sliding it all the way to the right (and un-linking it with temperature limit, which should be around 83 C). The way you should do it (starting at default clocks) is to do what I said earlier with the core voltage, power limits, and temperature limits, and in increments (I start with incriminates of 50 MHz, and when adding 50 is too much, 35, and if that's too much, so on and so forth) until I begin to get artifacts or...
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Ne0Wolf7

Ne0Wolf7

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Jun 23, 2016
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http://www.tomshardware.com/faq/id-2749337/safe-gpu-overclocking-guide-2016.html
Everything you need to know.
The way your doing it, with the core voltage, is fine, you can even slide it all the way to the right without lowing your cards life at all. Power limit evidently limits the power you can put at your cards. Again, sliding it all the way to the right (and un-linking it with temperature limit, which should be around 83 C). The way you should do it (starting at default clocks) is to do what I said earlier with the core voltage, power limits, and temperature limits, and in increments (I start with incriminates of 50 MHz, and when adding 50 is too much, 35, and if that's too much, so on and so forth) until I begin to get artifacts or it no longer works, and then the same for the memory.
Nothings unsafe, and I'm not sure why you started out overclock quite a bit, but you seem to have won the silicon lottery. You want to keep pushing you clocks farther until you: A- get artifacts; B- You lose your display; or C- you temperature near that limit of 83 (maybe stop increasing clocks when you start to hover around 78?).
The one MAJOR thing you didn't mention doing is MSI Kombuster. It's a more stressful test (called a stress test) that will determine definitively the you card is stable.
More detail of what I said is in the link, if you don't understand a part of it ask.
 
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