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~~The GTX 670 Overclocking Master-Guide~~ - Page 104

post #1031 of 3357
guys i'm really confused:

1. setting power target and adjusting voltage to max just means that it CAN use that much power and voltage up until it reaches whatever maximum OC that you do correct? it doesn't mean that it will start consuming XX% of power or volt up to XX mV correct? so it will only volt up or consume as much power as needed, but i'm just raising the ceiling it CAN go up? please tell me if this is correct or not

1.a would it matter to just have power target and voltage at max at all times?

edit: nvm re-read it again. #1 and 1a are my only questions

thanks i really wanna start my first OC.. but this is slightly confusing.


p.s. is it good or bad to run OC 24/7? or does it depend how much you are OC'ing?
Edited by frankietown - 11/9/12 at 1:56pm
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post #1032 of 3357
1. Setting power target to max just means you'll allow your GPU to use more juice than normal, if needed. For example, if your GPU while rendering most games uses ~98% power target, you have to raise it otherwise you will not be able to overclock. As for voltage offset, I think it just forces the voltage to be at the max when max clock is achieved. Not 100% certain about this point though.

1a. It will matter depending on what you want to do. Though with Nvidia's GPUs these days, even if you max out both of them you'll still get downclocking to save power anyway.

Now, my questions. Why do you need to find out by the MHz? I've noticed that the max clock tends to jump at certain clock offset values for the core clock, so as long as your max Kepler boost is stable and highest it can go then it shouldn't matter if your offset is 90 or 95 when both gives you 1280MHz, for example.

I'd agree doing that for the memory clock since it works differently, but why the core clock?
post #1033 of 3357
i have no idea what i am doing but this seems to finish heaven just fine. thoughts?





also my cards are different in mhz... one is at 1215 and the other is at 1277... does it mean my 2nd card is awesome out of the box? so maybe i shouldn't sync it and find their own separate OC offsets?

now time to play some games...
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post #1034 of 3357
I was running my OC profile w/ max voltage and max power 24/7, but then I discovered that when watching a video the card would jump to 914MHz and 1.212v. Since I turn all my fans to low most of the time the GPU was getting fairly warm. So, I made a 2nd profile that has min voltage and stock clocks. Now it goes to 0.987v at 914MHz while watching video. I left power target at max b/c that shouldn't even come into play.

frankietown, make sure to keep a monitor window going in the background so you can make sure your max boost isn't throttling. Once the bench finishes look at the graph and make sure your top speed stays pegged. Occasional dips are normal during scene changes, but make sure the speed doesn't drop and plateau during tough scenes once the card heats up.

And once you do start playing games make sure to check the graph when you exit the game. It'll allow you to dial in your OC better. If you get sustained speed droops increase fan/cooling, increase power target (my BIOS does 145%), or reduce OC.
Edited by jason4207 - 11/9/12 at 4:20pm
post #1035 of 3357
Hey guys, just curious... Can a 680 card have ZERO KB? I tried following the guide to figure out what my KB is and even after setting the power on PX to 134% and upping the voltage to 1.175, it will not go higher than my boost speed. This is at stock settings.

My card is an EVGA 680 FTW LE 4GB
post #1036 of 3357
I think theoretically it can. If you're running something like Furmark it'll probably not have much KB. Zero is a bit extreme though.

What program did you run?
post #1037 of 3357
Quote:
Originally Posted by invincibler View Post

I think theoretically it can. If you're running something like Furmark it'll probably not have much KB. Zero is a bit extreme though.
What program did you run?

This was with Heaven... I will try tomorrow with PX's test and 3DMark11...
post #1038 of 3357
Hey guys, I was able to flash a modified BIOS to my 680 FTW 4GB card and now I am business! I also was able to determine what my KB is and it's 130.

Anyway, I followed the OC guide and ended up with the maximum stable INDIVIDUAL values @ 1.212v :

Power - 150%
GPU Core - 1320 mhz (45+ offset)
Memory - 6880 mhz (350+ offset)

I then tried to use the above settings together but Heaven was crashing on me. I had to leave for work so tomorrow I guess I will begin to play with these settings and find a happy medium.

I think the above is great considering it's a 4GB card. Should I aim to try and keep my GPU core at 1320 and reduce only memory until stable or viceversa, reduce GPU core and keep memory at 6880 or reduce both at once?

BTW, never did my temps go above 42C!!!! thumb.gif But this is with a push/pull config on my H80 and FULL SPEEDS. Sounds like a leaf blower! hahahaha Once I find my stable combined speeds, then I will lower the fans and hopefully be able to quiet them down considerably and keep temps in the low 60s under full load.
Edited by HondaCop - 11/10/12 at 4:17pm
post #1039 of 3357
This is a great kepler Overclock guide.

I came from a HD4770 and i wasn´t sure about how to overclock my gtx660ti power editon and ti guide helped me a LOT. smile.gif

Thanks for the awesome guide. wink.gif
Edited by nuno_p - 11/11/12 at 7:05am
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post #1040 of 3357
Hi guys, Can you check my screenshots? My power % is going up to 300+ with my power target set only to 110%. Is that normal? And heaven keeps on crashing with these settings.

GTX 670 FTW LE
i5-3570k. @ 4.2

SughU.jpg
ydcyX.jpg
MzZ5n.jpg
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