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my gpu core clock goes up and down all the time (gtx 660)

post #1 of 24
Thread Starter 
even in a game, it goes up and down, usually when there's more things going on in screen

but, my old gpu did not do this, but i do in fact remember disabling something in bios to do with "gpu boosting" or something like that

not sure, but yea the main reason why i want it to stay at a certain clock at all times, is so i can stress test it better

in a stress testing program, it goes up more and stays high up, but when i play my game for some reason it goes down to ~850mhz sometimes, and all the way up to ~1000mhz. so yea

i like to play games to test my oc'ing, so does it matter if the gpu core clock goes up and down? (when stress testing)

if it does matter, can someone tell me how to get it to stay at the same core clock at all times?

ty
Edited by daemon7 - 12/10/12 at 12:27am
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post #2 of 24
Welcome to 600 series. Its a pain in the proverbial ass, but your GPU clocks will always fluctuate and there is nothing you can do about it.

Its called boost. You can read on how boost works and why you are seeing fluctuations on Nvidia.com
post #3 of 24
Thread Starter 
i see, ok thanks
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post #4 of 24
OCing is even bigger nightmare.

Imagine going from 8th grade algebra, to Collage level Calculus. It looks great on paper, but its a pain in the butt when its comes to practicality.

My 660Ti will go from idle 324Mhs to 992Mh when i watch a movie. It will rarely touch 1162 Mhz when i play BF3, yet it will hover around in average of 105xMhz all day long.


Welcome to boost.
.
Edited by KGB7 - 12/10/12 at 1:45am
post #5 of 24
How is it a pain in the butt? Push the power limit up, then adjust two sliders for core and memory offset. It could hardly be easier.

OP, the card will automatically change frequency based on the load and the power/thermal situation, so it is completely normal. It won't affect stress testing, or game performance, but iIf you turn up the power limit on the card using Afterburner or PrecisionX it'll probably change a lot less than it does now. If you really want to eliminate the frequency changes, you can use the K-Boost feature of PrecisionX, which will lock the card at the boost frequency.
Edited by Forceman - 12/10/12 at 1:46am
post #6 of 24
Quote:
Originally Posted by Forceman View Post

How is it a pain in the butt? Push the power limit up, then adjust two sliders for core and memory offset. It could hardly be easier.
OP, the card will automatically change frequency based on the load and the power/thermal situation, so it is completely normal. It won't affect stress testing, or game performance, but iIf you turn up the power limit on the card using Afterburner or PrecisionX it'll probably change a lot less than it does now. If you really want to eliminate the frequency changes, you can use the K-Boost feature of PrecisionX, which will lock the card at the boost frequency.


Thats like a pilot telling a hot dog stand owner; "Flying a plane is easy, just pull on the stick and the plane goes up and down."


600 Series is a whole new ball game. Everything is new. So there is a lot of things you have to relearn when it comes to OCing with these cards.

Its easy for you, because you know how to. OP, doesnt even know the basic thing about Boost.
post #7 of 24
It is literally as easy as moving three sliders in Afterburner and then stability testing. I honestly don't know what you think is hard or complicated about it?

The card automatically boosts to a higher clock speed under load, exactly like CPUs do now, and overclocking is just adding a user-specified offset to that speed. That's pretty much all you need to know.
Edited by Forceman - 12/10/12 at 2:03am
post #8 of 24
Quote:
Originally Posted by Forceman View Post

It is literally as easy as moving three sliders in Afterburner and then stability testing. I honestly don't know what you think is hard or complicated about it?
The card automatically boosts to a higher clock speed under load, exactly like CPUs do now, and overclocking is just adding a user-specified offset to that speed. That's pretty much all you need to know.


Its not that easy and thats not all you need to know.

Boost is a nightmare to deal with. The stability testing software's are useless, they aren't properly written for 600 series cards. Ive been saying this for the last two days in multiple threads.
post #9 of 24
Quote:
Originally Posted by KGB7 View Post

Its not that easy and thats not all you need to know.
Boost is a nightmare to deal with. The stability testing software's are useless, they aren't properly written for 600 series cards. Ive been saying this for the last two days in multiple threads.

You still haven't explained why you think it is a nightmare, or what more you need to know. The card automatically adjust its speed based on the power and thermal profile to maximize performance. The internal mechanics of how that happens are of no concern to the normal user. As an overclocker, all you need to know is that you can use Afterburner or PrecisionX to add a user-specified offset to the card's normal core and memory clocks. You can also increase the card's internal power limit, the point at which it start to limit the clock voltage and speed to keep it under that power threshold. So all you need to do is maximize the power limit, then add some offset to the core and memoery (+50 and +200 is a good starting point) and then check for stability using Heaven or some gaming. If everything is fine with that, you can try pushing the offsets a little higher, testing for stability at each point. If you get crashes or artifacts, pull back the offset a little and bam, you are all set. And the normal stability checking tools, like Heaven, work just fine with Kepler cards. Furmark and Kombuster might not, but those were never very good to use because they aren't representative of normal gaming loads - which is why both AMD and Nvidia limit the cards at the driver level when you run them. That was implememnted with Fermi for Nvidia, so Kepler has nothing to do with that.

Just because you don't understand it, or like the method Nvidia hs chosen, doesn't make it a "nightmare to deal with".
post #10 of 24
Its nightmare, because no tool is written to properly test Kepler cards. I have to run two separate things at the sane time too see Boost Speed at its limit and for it to be constant.

I know how to OC and understand it, so dont assume what i know and what i dont.


I can run Heaven, 3dmark, games all day long, and i wont have one single issue. Thats because the card will not Boost to Max speed, it will hover under it by 150Mhz.


As soon as i fire up two different software's, the BOOST speed will hit the wall and will stay there till the system crashes, even if the fan is set to 100% and the temps are under 50C. It will crash with in Min.

How do you propose we solve this issue? Not my crashing issue, the testing issue.
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