Overclocking on stock volts doesn't increase the heat as much
compared to increasing the voltage and clock speed, but it still will increase.
As Solar mentioned having them in SLI reduces airflow (the top/primary card) will already be running a little hotter than the bottom one, so you can always try and fit a fan in your case to get as much airflow between them.
Lifespan can become a real issue if
you are running at high temps for prolonged
periods of time or if you plan to keep using those cards for several more years.
As for apps, MSI Afterburner
is a good one. GPU-Z
is also good for monitoring other temps.
Quote: Originally Posted by mrwearysinner
like if i overclocked and playing a heavy duty game..chance the card might just give up?
Crash, system freeze - yes. Instant death, no. Adjusting voltages? - can definitely brick a card if too much.
It's also more than just monitoring the core temp of the cards - you also have to consider the VRM's (bits responsible for feeding your card voltage)
Ultimately it's 'safe enough' if kept within 'safe' parameters.
How hard you want to push the cards is up to you, but a good rule of thumb is if you can't afford to replace it, don't hammer it.