Yes, you're right. I do apologise for that. I knew before the 60 Hz clock cycle was just that, which is why we're waiting for 120 Hz monitors. (120 Hz specified in the owners manual at a particular resolution) What I was unsure of was whether the pixels were allowed to change themselves asynchronously or not. So basically what you're doing when you turn Vsynch off is instead of waiting and taking a one snap shop every 1/60th of a second, you're allowing the information to update itself as long as its within that 1/60th of a second clock cycle, then the information gets sent out as a group which means that some pixels will be out of place resulting in tearing. Having said that, response time is still important because if the response time were greater than the actually vertical frequency refresh rate, you'd get lower fps for sure. In a game, it's very noticeable the difference between having Vsynch on and off. The screen appears to change much faster with Vsynch off, although you do get tearing.