cooler master rs-500-pcar-i3
That's a budget low-end PSU. Is that
Extreme Power plus model ? The GTX 980 Ti requires a minimum 600 Watts or greater PSU, high quality unit that is. Don't use this specific CM Model to power up this GPU. I think this unit even
lacks the PCI-E cables needed to power up the 980 Ti.
This power supply might deliver 500 W, but with efficiency above 80%, only when you pull between 40% and 60% load (between 200-300 W) . Still, not recommended.