max overclock for GTX 970 G1 GAMING 4GB

[SHREDDER]

I have GTX 970 G1 GAMING 4 GB. After many overclocks and test the maximum and stable overclock(during gaming) it can work i found that is
+100 mhz core+250 mhz memory. However after reading in various forums about overccloking it seems like the maximum overclock the 970 G1 Gaming can take = +140 mhz core+250 mhz memory. However mine crashes in all games if overclock the core to anything higher than 100 mhz. Why? I overclocked it with MSI afterburner. I put power limit to the max(112). Temperature never reach 70c so it must be another problem. Possibly my PSU not enough for such high overclock on the core? It is 650 watt but i dont remeber the model.

[Hare+Guu!]

Most people get to 1900 on stock cooling/voltage settings, ie 83c. Some manufacturers set it to 60c.
People can reach 2100 when they up the voltage and set temp limit to 90c+ and crank the fan up to some high and loud setting.
Power limit isn't the same as voltage. You need voltage + powerlimit to reach the max of the card.

[just.kamk /idle]

Originally posted by SHREDDER:

...However mine crashes in all games if overclock the core to anything higher than 100 mhz. Why? ...

It depends on the chip. Every card is different. Simple as that.
Some can OC 100mhz, others can OC 200, etc.

[SHREDDER]

I have the power limit to 112(that the max it can get) and also temerature to 91 but i didnt touch core voltage because it can burn the carrd.

[just.kamk /idle]

Pretty normal values for a decent 970.
Keep in mind, your card is already factory overclocked (so you basically OC the existing OC). The stock ones run wayyyy slower.

[SHREDDER]

Ok so the 100mhz core+250 mhz memory that it works ok is normal you say?

[just.kamk /idle]

Without voltage increase, and that power limit, yes.
And keep in mind: every chip and card is different.

And just btw: you could say +100, but from which baseline? 1200? 1300? 1350? (hope you get my point).

[®NapalmSunrise®]

Originally posted by SHREDDER:

I have the power limit to 112(that the max it can get) and also temerature to 91 but i didnt touch core voltage because it can burn the carrd.

TBH you can set the max voltage to +87 but by design it will never go that high and draw that much extra voltage, while overclocking run GPUZ and have the sensor tab selected, it has a nice feature to help with getting your overclock stable but volts will need to be raised. Its called PerfCapReason = there are conditions that will limit your GPU, Temp and Volts are the 2 major conditions.. In your case it seems for stock volts your limit is +100 on your core which is pretty good..

http://imgur.com/a/94MY0

Run your card at 100% completly stock and run a stresstest and monitor it with GPUZ and see what triggers 1 of the conditions. It should trigger vRel = or VOp = both meaning lack of power/voltage. needs more juice. Power limit you can max,set temp limit to what you feel is safe ( ive always ran 91c no issues), set a custom fan curve if you need to keep inside your desired temp limits if needed but manually setting a fan speed % works well also and up your volts with +12 to start and bump your clocks up and retest and repeat.. As always not every GPU is created equal and results will vary..