You will know if your GPU is unstable because the driver will try kicking out. If that happens your screen locks up and the driver will try to reboot itself (sometimes). If not your screen will lock up until you force the machine to reboot. That would be "unstable" by most overclockers standards. The second factor to watch out for is heat, overclocking will raise peak temps for your card. This is why stress testing software like MSI Kombustor exists, to push your card to the limits with maximum power consumption to purposely make it run hot. This way you can monitor the temperatures under a typical full load. If you don't get lockups in 10 minutes, and your temperature is perfectly acceptable. Then the overclock is good, you should be able to run it 24/7 without a problem. If you ever get lockups in games after that, just back down your core and memory just a hair.

 

Quote:

Originally Posted by Warmonger

You will know if your GPU is unstable because the driver will try kicking out. If that happens your screen locks up and the driver will try to reboot itself (sometimes). If not your screen will lock up until you force the machine to reboot. That would be "unstable" by most overclockers standards. The second factor to watch out for is heat, overclocking will raise peak temps for your card. This is why stress testing software like MSI Kombustor exists, to push your card to the limits with maximum power consumption to purposely make it run hot. This way you can monitor the temperatures under a typical full load. If you don't get lockups in 10 minutes, and your temperature is perfectly acceptable. Then the overclock is good, you should be able to run it 24/7 without a problem. If you ever get lockups in games after that, just back down your core and memory just a hair.

thanks for the response
other than that, what will happen if my oc isn't stable @ MSI Kombustor? does the screen is got artifact? or what?

and how to use msi kombustor? can you tell me step of step? I am sorry for my limit overclocking experience.

 

Quote:

Originally Posted by Sharchaster

thanks for the response
other than that, what will happen if my oc isn't stable @ MSI Kombustor? does the screen is got artifact? or what?
and how to use msi kombustor? can you tell me step of step? I am sorry for my limit overclocking experience.

Too high memory clocks are what causes artifacts most of the time. If your GPU core isn't stable (not getting enough volts) the display driver will fail and you will certainly know it. Otherwise im not to fond of installing Kombustor to make you a guide, maybe someone else will tho. It should be pretty straight forward, no harder then setting up a games graphic settings.