GTX970 overclocking details

[imakuni1995]

Hey there!

I recently overclocked my GTX970 using MSI Afterburner. Since I don't know much about overclocking I decided to let a Youtube tutorial guide me in my plan.
Following the instructions from the video, I put the power limit up to 120% from 100%. Core Clock went from +0MHz to +200MHz and memory clock to +350MHz from +0MHZ.
After I did this, I was able to run most games pretty well, but I noticed that some crashed a lot and I got a couple of driver errors.
Which leads me to believe that my current clock is too high and I am wondering, which of the paramters I should change to fix this.
My CPU is an Intel Core i5-3570k @ 3.4GHz, which isn't overclocked, but I activated "Performance Mode" in the BIOS, so I don't know if that counts. Unfortunately, I don't know much about my PSU and motherboard type, since I don't think you can check those without opening the PC.
Win 10 and 8 gigs of RAM.

Thanks a lot in advance!

 

[Vellinious]

Add some voltage, or lower the core clock.

Also...FYI....Your offsets are relative to the base 3D clock for your card, so without knowing which card you have, OR what MHZ the overclock is actually running at, you may as well have told us that you were fishing, instead of overclocking.....it gave us about the same amount of information.