GTX 970 overclock crashes

[Desmond S]

I'm pretty new to overclocking. Recently i tried to overclock my Gigabyte G1 970 to squeeze some extra frames in games. I raised the core clock by 100mhz on Afterburner and ran Kombustor and Heaven Benchmark for an hour without issues. Temps are just over 70C.
Then i moved to testing some games but they all crashed within the first hour. I raised the voltage by 15mV hopefully to stabilize the overclock but got a black screen and reboot instead. I saw people getting way better overclocks without even touching the voltage. Am I just unlucky with a bad overclocker?

Full specs:
Gigabyte G1 GTX 970 rev. 1.0 (ASIC quality 67.8%)
I7 8700 non-k
Gigabyte Z370M D3H
16GB DDR4 3000mhz
Cooler master RS550-AFBAG1-UK 80 Plus Gold Power

edit: I've done some further testing. Some games couldn't take any overclocking at all. Surprisingly the only game that didn't crash so far is Battlefield 1. Anyway, If my card can't even handle +100 on core, which is 5% fps gain, there is not much reason to keep playing around with it at the expense of stability. But one thing i'm clear is next time when I decide which card to go for I wouldn't take the so-called 'overclocking capabilities' or 'extra performance' too seriously. Thanks guys.

 

[Ztdutxjgxgtu]

Every game has different tolerence level, especially with ubisoft..squaresoft....

May be just bad luck...
Imo, +100mhz is a safe spot on my msi970

 

[giovanni86]

I'm pretty new to overclocking. Recently i tried to overclock my Gigabyte G1 970 to squeeze some extra frames in games. I raised the core clock by 100mhz on Afterburner and ran Kombustor and Heaven Benchmark for an hour without issues. Temps are just over 70C.
Then i moved to testing some games but they all crashed within the first hour. I raised the voltage by 15mV hopefully to stabilize the overclock but got a black screen and reboot instead. I saw people getting way better overclocks without even touching the voltage. Am I just unlucky with a bad overclocker?

Full specs:
Gigabyte G1 GTX 970 rev. 1.0 (ASIC quality 67.8%)
I7 8700 non-k
Gigabyte Z370M D3H
16GB DDR4 3000mhz
Cooler master RS550-AFBAG1-UK 80 Plus Gold Power

Core OC are tougher then memory OC. Memory you can go pretty high on OC. Not to say 100 is a lot but ive noticed on cores my old 980's i can barely push 50 to 70. The older they got it didnt like me overclocking the core. Memory however you can bump usually 300 to 500. And as someone mentioned early each game is different. Which is why overclocking should be taken lightly if you play a lot different games.

 

[The Paladin]

if this helps you a little to understand your OC problem;
The best I ever got OC on my GTX (EVGA GTX 970 SSC) was 450 memory and 75 on core.

 

[Ztdutxjgxgtu]

Back in those days people adds 130~150 on core.
That was the standard of 970?