Dell XPS 13 (Q1 2013) Ultrabook Review: What a Difference 1080p Makes
 

Around this time last year, we had a chance to take a look at Dell's first ultrabook, the XPS 13. This was an ultrabook I was for the most part fond of, but one that was clearly suffering from being first generation ultrabook hardware. Ultra low-voltage Sandy Bridge chips were perfectly serviceable, but they could still generate a tremendous amount of heat in a chassis the size of the XPS 13. That meant noise and heat were both serious issues. Compounding that was a routine, run-of-the-mill, utterly dismal 1366x768 TN panel display.

http://www.anandtech.com/show/6849/d...ence-ips-makes