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~~The GTX 670 Overclocking Master-Guide~~ - Page 248

post #2471 of 3357
I've followed all your steps but for some reason I can't get my power consumption to go above 100% TDP, even though I have it set in EVGA precision to go up to 150%. Is this limiting my overclock ability or does it not really make a difference?

Your card's model: GTX 660 TI
Your Boost Clock: GPU-Z says 980 Mhz, but during a bench mark I was hitting 1,202 Mhz
Your Max Boost (This is your Boost Clock + Kepler Boost): Not sure
Your Memory Clock: 3402 Mhz
Your Power Target and Voltage setting: 150% and 1212 mv

Thanks in advance for any help smile.gif
post #2472 of 3357
Sounds like you have a card that is *not* power hungry. That's a good thing, should help it run cooler. Sounds like you may have headroom to run with higher clocks.

You want it to be able to use as much power as is needed to run 'xyzbenchorgame' at the clock rates you have dialed in. By moving the power target up, you're allowing the card to use more power without throttling down. Valley isn't all that demanding in terms of power consumption compared to synthetic tests. To see how your card handles hitting the power limits, you can try some of the tests available in EVGA OC Scanner (Furry-Tessy Donut is intense).

But CAUTION: Sounds like you flashed a custom bios but it also sounds like you don't fully understand these things? I think that's a dicey combination. The voltage, power, and thermal limits are in place to protect the card from damage. You're removing safeguards, so be careful.

Quote:
Originally Posted by erickj92 View Post

I've followed all your steps but for some reason I can't get my power consumption to go above 100% TDP, even though I have it set in EVGA precision to go up to 150%. Is this limiting my overclock ability or does it not really make a difference?

Your card's model: GTX 660 TI
Your Boost Clock: GPU-Z says 980 Mhz, but during a bench mark I was hitting 1,202 Mhz
Your Max Boost (This is your Boost Clock + Kepler Boost): Not sure
Your Memory Clock: 3402 Mhz
Your Power Target and Voltage setting: 150% and 1212 mv

Thanks in advance for any help smile.gif
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post #2473 of 3357
I am confused.

I have both cards at 1100 boost clock, but when I run a bench (3dm11 for instance), the clock is just going from 1113 to 1188 all the time, sometimes 1201, but never stays constant. Temps are in the 65 area, never getting above 66. I have the profile set at max power and is PX I have power at 120%.

What is going on?
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post #2474 of 3357
I did flash a custom BOIS and understand it. I upped the voltage, max power consumption and max boost clock to be able to get a higher OC. The only thing I'm not understanding is why my card is only using 100% of the power limit when I'm at my core clock limit. It's almost as if the card doesn't realise it can use more power. I'm also aware that I removed safeguards and am monitoring my temps very carefully smile.gif
Quote:
Originally Posted by michael-ocn View Post

Sounds like you have a card that is *not* power hungry. That's a good thing, should help it run cooler. Sounds like you may have headroom to run with higher clocks.

You want it to be able to use as much power as is needed to run 'xyzbenchorgame' at the clock rates you have dialed in. By moving the power target up, you're allowing the card to use more power without throttling down. Valley isn't all that demanding in terms of power consumption compared to synthetic tests. To see how your card handles hitting the power limits, you can try some of the tests available in EVGA OC Scanner (Furry-Tessy Donut is intense).

But CAUTION: Sounds like you flashed a custom bios but it also sounds like you don't fully understand these things? I think that's a dicey combination. The voltage, power, and thermal limits are in place to protect the card from damage. You're removing safeguards, so be careful.
post #2475 of 3357
Are you asking it to do anything that would require it to use more power than it is? Is running all out, without throttling clocks, and just not needing any more power to run whatever it is that your running? If the core clock is a nice flat horizontal line at your max boost speed with 99% gpu utilization... great smile.gif

That furry-tessy donut test is a real power monger, try that at 1024x640 with vsync turned off.
Quote:
Originally Posted by erickj92 View Post

I did flash a custom BOIS and understand it. I upped the voltage, max power consumption and max boost clock to be able to get a higher OC. The only thing I'm not understanding is why my card is only using 100% of the power limit when I'm at my core clock limit. It's almost as if the card doesn't realise it can use more power. I'm also aware that I removed safeguards and am monitoring my temps very carefully smile.gif
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post #2476 of 3357
The test you spoke of did indeed bring it to about 130%. As far as the clock, it stutters a bit when it gets to it's peak. I'm not completely sure why, as I have the voltage up, my temps are under 70°C (About 60-65°C under load) and my TDP is set to 150%. I'm not too terribly concerned about the stuttering though, since I don't notice a performance impact and I'm not having any crashing issues or artifacts. If it wasn't for me staring at EVGA precision, I wouldn't even notice the fluctuations which are very small anyways.

I really appreciate your advice. I've overclocked many CPU's, but I have less experience with GPU's so issues like these are odd to me, especially when I follow things by the book and am giving the card plenty of power and keeping the temps in check.
Quote:
Originally Posted by michael-ocn View Post

Are you asking it to do anything that would require it to use more power than it is? Is running all out, without throttling clocks, and just not needing any more power to run whatever it is that your running? If the core clock is a nice flat horizontal line at your max boost speed with 99% gpu utilization... great smile.gif

That furry-tessy donut test is a real power monger, try that at 1024x640 with vsync turned off.
post #2477 of 3357
^^^ your welcome, i just started fiddling with overclocking things last year. first some tickering with unlocked boost multis on my cpu, then voltages to get it stable, and then getting my 670 to handle farcry3 more satisfyingly. The tools for gpu oc'ing, well there are fewer knobs and levers with nvidia cards so its easier and i got familiar enough with precX and OCscanner to make sense out of them. I'm not so daring as to flash new bios's to alter voltages myself, just not for me (at least not yet)... individually configurable settings i'll fiddle with.

sounds like you have your card working well, there's a massive thread for "valley" benchmark results so you can see how your system is doing compared to similar and all kinds of other setups...
http://www.overclock.net/t/1360884/official-top-30-unigine-valley-benchmark-1-0-fill-the-form
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post #2478 of 3357
As a follow up - I maxed voltage slider (at 1.150 in PX), and it still fluctuates. Just like the GPU clock. Temps are fine. In the nvcp I set max perf and no go.

Mind you, the volts are going from 1.150 to 1.175 and so on, never stays still at max.
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post #2479 of 3357
Quote:
Originally Posted by H3avyM3tal View Post

As a follow up - I maxed voltage slider (at 1.150 in PX), and it still fluctuates. Just like the GPU clock. Temps are fine. In the nvcp I set max perf and no go.

Mind you, the volts are going from 1.150 to 1.175 and so on, never stays still at max.

You've got an SLI setup and i know nothing of that. But I do know there are at least two reasons these cards downclock themselves. The first is when exceeding thermal limits, clocks drop by 13mhz when hitting 70c and more when hitting 80c. You say temps are fine. The second reason is when exceeding the power limits. I don't know what regulates the voltages, maybe its a function of clocks and gpu usage. Anyway, you can use the graphs produced by precX preformance log to determine (to some degree) what's going on.

Do the drops in clocks coincide with rises in power usage up to your limit? Dbl click on the three displayed in the main window to open a tear-off window showing more graphs.

3dm11 causes mucho power usage on my card. It could be that you're just bumping into that too when running that particular benchmark. Valley and Heaven I think are more representative of the sort of load real games will put on your cards. 3dm11 seems more contrived (synthetic) in nature. A good bench, nice for a stability test too, but I don't fret about tuning things to run that bench, so i don't care if it hits my power target (which it does) particularly. Also that test does cycle thru different tests, if the dip and rises you see coincide with different tests stopping/starting then i think that could explain those particular dips/rises.
Edited by michael-ocn - 6/5/13 at 12:33am
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post #2480 of 3357
Hi

Did anyone manage to find a fix for TDP throttling on Power Edition cards? I know that GTX 670 can be flashed with Galaxy BIOS and it's fixed, but I can't find any solution for 660Ti. It seems that MSI doesn't care about this problem at all. 2 months ago I didn't care, because I never suffered from TDP throttling in games, only in benchmarks. But lately I started to play Sleeping Dogs, maxed out and whenever TDP reaches 101% (and it happens often) card throttles like crazy (sometimes even 50-80 MHz). Temperature never goes over 64 degrees, it happens even without OC applied on stock voltage so now this became real issue and I'm thinking about RMA.

Offcourse I applied 114% power target but it doesn't change anything.
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