Hi Tech Legion posted a review on the Diamond Radeon HD 5770 XOC Edition Video Card

The Diamond Radeon HD5770 XOC comes overclocked right out of the box. The Diamond Radeon HD5770 XOC takes all of the fear and hassle out of trying to overclock yourself. The Radeon HD5770 is a mainstream gamer card and the XOC edition is geared more for the gamer that needs a little more power without voiding their warranty. You still get all of the same functionality, like DX 11, and all of ATI's perks, such as Stream and Eyefinity.

Diamond Radeon HD 5770 XOC Edition Video Card Review