EVGA 980SC overclocking issues

[Jsmd1999]

i am having problems when overclocking my gpu

my card default clock is 1241 and i am only able to get 1381

              boost clock is 1342 to 1482

most people can get it stable at over 1500mhz boost clock, is there anything i am doing wrong

my power settings are at 125% (max)

max temp is at 91 degrees celcius

+140mhz on gpu clock offset 

+200 mhz memory clock offset

 

should i change the vcore (voltage)

Thanks

[Majestic]

You have absolutely no guarantee of reaching any certain OC. 91 degrees is also pretty damn hot.

[bbrooking18]

You can do but be very careful, chances are you didn't do as well out of the silicon lottery as you would have liked

[Raudi_]

i am having problems when overclocking my gpu

my card default clock is 1241 and i am only able to get 1381

              boost clock is 1342 to 1482

most people can get it stable at over 1500mhz boost clock, is there anything i am doing wrong

my power settings are at 125% (max)

max temp is at 91 degrees celcius

+140mhz on gpu clock offset 

+200 mhz memory clock offset

 

should i change the vcore (voltage)

Thanks

Try more voltage for the core you can max that out and be safe with causing any damage to the card. 

Also if your on the blower cooler, create a custom fan curve to keep those load temps down a good amount.

[Jsmd1999]

i know the temp only reaches 80 degrees

but on evga precision x it is set at that

[Jsmd1999]

how much should i add the vcore by

and thanks

[AlwaysFSX]

Try more voltage for the core you can max that out and be safe with causing any damage to the card. 

Also if your on the blower cooler, create a custom fan curve to keep those load temps down a good amount.

More voltage at 91C wtf are you thinking?

[Jsmd1999]

no it only reaches 80 degrees

[Jsmd1999]

gpu temp target 91

[Raudi_]

More voltage at 91C wtf are you thinking?

You should of fully read what I posted before saying WTF am I thinking. I am assuming he is on the blower style cooler which desperately needs a custom fan curve to keep the temps down so having more voltage won't be any issue IF he sets a custom fan curve.

I think @Najuno did the same thing for his 980's

[Jsmd1999]

what shall i do to the fan curve in precision x if you dont mind telling me

[Raudi_]

what shall i do to the fan curve in precision x if you dont mind telling me

Since I'm still on Kepler and using 1.3V on Titan style blower coolers this is my fan curve it never gets above 60% under a full load

[Najuno]

I use for my GTX980 3way SLI 2 reference design coolers and 1 aftermarket blower. This is for sure not the most beautiful looks but I'm looking for best performance and not just something for showing off.

First of all a core of 1342MHz is a good OC already and you can almost boost stable to 1500MHz. 1482MHz is a fine result.

Second even going up to 1500MHz, whats your goal? You won't break any records and just for your own sake of being able to say you've got 1500MHz... well we all have to follow our mindset right ? Because 18MHz more of the boost won't give you any more performance in games only in benchmark, and only then if the OC is stable.

 

I'd rather make sure to pair this 1482MHz with the right memory OC and your performance gain will be higher than +18MHz on the core. Going up all the way with temp and power target is correct for high OCing. 125% power and 91 degree Celsius. I overvolt +37mV and get up to 1552MHz on one of my cards BUT every GPU has a certain ASIC and that determins how much OCing potential the card has. Further it depends on your memory controller and on the brand of your VRAM. Usually Samsung RAM OC like no others. Unlink power target and temp threshhold and set the focus on power.

If you are just looking forward to do a benchmark run forget about fan profiles.Open up your side panel of the case and set the fan to 100% and run the benchmark or system stability test.

Now if this is OCing for a daily usage I'd only use max 80% percent of the card's OCing potential, and set the power target to 115% with 86 degree Celsius not linked. In that case I'd go for a custom fan profile that goes up to 70% percent fan speed over 75 degree celisius but in an exponential way. The card will stay with the OC more on the silent side but show its teeth when needed and the noise levels will stay acceptable. Also make sure you've got a good airflow in your case when using an aftermarket cooler and using a custom fan profile to tame the OCed card.

Other than that if you want to run higher OCs permanently I'd strongly recommend a modded BIOS and a custom water cooling loop.

 

OCing CPUs and GPUs is a matter of time and experience. A lot of people jsut think because they've got a GM204 it MUST be a super highend OCer or that a cherry picked chip is a guarantee for OCs beyond all limits. Again all cherry picked or SC G1 whatever version guarantee only the factory OC out of the box... why do you think they never really OC the memory? Just because they want to keep it as stable as possible.