Overclock Gainward Gtx 750 ti Goldensample

[Abteen]

Hi,
it's my first oc so please be patient and enlighte me step by step.
i have a default program for this gpu (Gainward Gtx 750 ti Goldensample), called Expertool and it has built in overclocking option.but i love my gpu and don't want to broke it.(low budget excuse!of course if i could buy 1080ti , would burn it instantly!)
what is the most safe setting for constant use (my pc almost always is On!) or highest setting for instant usage like gaming or rendering?(short period use)
i upload 2 pictures, one is the program at default setting and another is highest number of first three options.
what should i adjust each of them for least harmful setting and better performance?
I don't know why they didn't link voltage to oc offsets?what is different between first two?can i set them to highest without problem?

Thank you.


First Picture (Default)
Second Picture (Maximum)

 

[robax91]

GPU clock offset to +100mhz
Memory clock offset to +50mhz
Voltage minimum offset +0.15v
Power target 100%
UNCHECK linked [ ]
leave unchecked [ ] prioritize gpu temp target
GPU temp target 80c
leave unchecked [ ] overvoltage + 0.0v
target framerate MAX

 

[Abteen]

GPU clock offset to +100mhz
Memory clock offset to +50mhz
Voltage minimum offset +0.15v
Power target 100%
UNCHECK linked [ ]
leave unchecked [ ] prioritize gpu temp target
GPU temp target 80c
leave unchecked [ ] overvoltage + 0.0v
target framerate MAX

Automatically changes Voltage minimum offset to 0.18v.
Is it optimal or safe max?
Memory 3054Mhz Core 1302Mhz
Here is the result

 

[robax91]

That looks alright, you need to run some benchmarks and look for artifacts or just play some games. Look for freezing frames or black spots on the screen/discolored specs, if you don't see those you'll be fine. Turn off vsync when checking or you'll get freezing that isn't from a bad OC (just to check it, you can turn it back on after.)

If you do get artifacting drop the offsets by increments of 10 until it goes away one at a time.