Lag issues.

I recently got this computer, 8 gb ram etc: http://screensnapr.com/v/xFR5Ah.png

and whenever I record with my dazzle, it's really laggy. Not on my xbox, but on my computer. I use Pinnacle to import the stuff to. The same thing when I play minecraft. I can play any other game fine, full screen games with no lag, but this happens with just these 2. On my other computer, 4 gb ram, and pretty much an older version of this, I could record with no lag and play minecraft with no lag. Does anyone have any solutions to what might be the problem?

Btw, it's not my computer that's laggy, just the pinnacle/minecraft. I can do other things just fine while having minecraft/pinnacle open.

 

You probably have something wrong with your pinnacle input settings. Try turning off preview , and adjust the frame rate of capture, look online for best settings.