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980 ti overclock help - Page 2

post #11 of 37
Quote:
Originally Posted by Teafac3 View Post

My asic score is 74.9 btw. Also what did u use to test your overclock and how long did u run it?

I run valley and firestrike for about an hour, but the true test is running my games, one of my games out of over 60 doesn't like the oc and I have to drop it to 1525mhz
but all my other games are fine with 1558mhz
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post #12 of 37
check out this one, it only lasted in valley for about 1 minute smile.gif
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post #13 of 37
Thread Starter 
Yeah thats crazy i bet. So i set voltage to +87, power to +139, temp to +91c, core clock to +75 which puts me at 1467mhz but once temp reaches 70c after running firestrike for 6 mins core goes down to 1455mhz is this normal? Memory is set to stock till i find a stable core. Also have the fan profile set so at 50c fans at 80percent then 60c fans at 85percent. Am i doing it right?
post #14 of 37
Your hitting power limit.
Over volt is basically worthless on 980 ti since once you start raising the voltage the power usage goes insane and you have only a very small gain for the voltage. 1.25v is the most youd ever want to run and with that your going to want to be under 60C with a power limit of 140% for it to be worth while. 1.28V is the hard limit and you need to hardware mod it for any more then that.

On my one temp was the biggest thing so the cooler it runs the less it hits the power limit.
I settled for 1.23V on my full water block since it keeps it under 50C at load. Fire strike sees about 125% power limit at 1495mhz.


On the stock cooling I was getting 1445mhz with 1.2V for 128% power limit with it getting up to 70C.
Put custom fan profile for 100% fan over 50C and managed to push it to 1465mhz on 1.2V with it hitting 130% power limit which is the max for my cards stock bios.

Furthest I pushed it has been 1.28V when I was first looking for a stable clock and used custom bios which allowed for 200% power limit. That didnt gain anything over 1.25v other then using 10% more powerlimit for the same clocks.
On 1.25v I was just reaching 1505mhz stable for a 140% power limit in fire strike which was only 130% in games like BF4.
I wasnt happy pushing it that hard for such little gain.

Vram counts into the powerlimit as well. Difference between stock and 2000mhz is 8% power limit usage.
post #15 of 37
Thread Starter 


ran firestrike extreme demo loop for 20 minutes stable these were my readings. where should i go from here? max clock was 1492 but once temps reached 70 it droped to 1480
post #16 of 37
Quote:
Originally Posted by Teafac3 View Post



ran firestrike extreme demo loop for 20 minutes stable these were my readings. where should i go from here? max clock was 1492 but once temps reached 70 it droped to 1480

Try to overclock the memory.
Your not going to get anymore out of the core with that temp.
post #17 of 37
I think the 980ti is more different than I thought from my 980 non ti I thought the only difference was the ti has more memory,
looks like to me it's just not liking to go very high which is odd as I always heard the ti version was the best.
maybe try going to the 980ti owners thread on here, I bet they can help you better.
http://www.overclock.net/t/1558645/official-nvidia-gtx-980-ti-owners-club
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post #18 of 37
Sorry , but no, 1550 is not guaranteed, and its normal for card to downclock 1 notch once it hits 70c ,but go ahead and fiddle with voltage and power slider and spend hours testing. It wont make a difference. Lowering temps will help, increasing voltage will help slightly, but I'm guessing you have a 1481 stable card.

Lots of people on these forums like to brag about unstable GPU clocks. Stable 99.999% of time isnt stable.
Edited by Lex Luger - 1/30/16 at 8:37pm
post #19 of 37
Thread Starter 
I got the core at 1502mhz increased fans to 100 percent once temp hits 50c max temp so far after 5 mins of firestrike extreme is 66c and stable clock hasnt dropped.should i go with it? Let it run for an hour?
post #20 of 37
Quote:
Originally Posted by Teafac3 View Post

I got the core at 1502mhz increased fans to 100 percent once temp hits 50c max temp so far after 5 mins of firestrike extreme is 66c and stable clock hasnt dropped.should i go with it? Let it run for an hour?

go +200 on the memory and see what happens, what brand of memory is on the card? that info is in gpu-z
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