Overclocking with Asus gtx 760

[Heiski]

For start, I have not overclocked before, but I'd like to know more. I'm not quite sure if I'm just doing something wrong or is my gpu just at its limit.
So, I wanted to overclock my asus geforce gtx 760 2gb. I'm using MSI afterburner, Heaven benchmark and of course gpu-z. I started to rise clock speeds 10mhz and then bechmarked. When Heaven started to crash, I increased voltage by 12 mV, cause it was suggested here: http://www.legionhardware.com/articles_pages/nvidia_geforce_gtx_760_overclocking_guide,2.html
and these guys got pretty good resuts with it:
http://www.tweaktown.com/articles/5567/nvidia-geforce-gtx-760-2gb-video-card-overclocked/index2.html

The thing is, I've seen people get much higher overclocks than me. I'm not stable with +85mhz and
+12mV voltage. So should I rise the voltage more? Or just settle with +75mhz or something like that. I'm planning to overclock my memory too, do I need to do that? Any other tips? Oh, and my gpu temperatures are around 70 while stress testing, so I guess that's not a problem. Is my card just bad overclocker?

 

[Yadhu]

No overclocking is the best!! yay. i assume you are using the asus card that has direct cu II cooler.Msi after burner is the best software for overclocking.however you will need a stable overclock.

This is a solid guide to overclock
http://rog.asus.com/96782012/gaming-graphics-cards-2/a-simple-guide-to-overclocking-your-graphics-card-with-gpu-tweak/

You should
1)have a good psu(very very important)
2)proper cooling
3)keep and eye on the temps(it will shut itself down if temp exceeds a limit)but just keep an eye on it

 

[Heiski]

Thanks. I think my psu is fine for this. I have Corsair cx 750w. I have heard lot of bad things about cx series though, does it show up in overclocking? And I would really like to know is that +12mV too much or too little. What would be "safe" voltages for my card?