Today we have the opportunity to look at the Diamond Radeon HD5750 OC video card. There are a few features about this card that break away from the reference design. The first thing I noticed when looking at the card is that it uses a bright red PCB.  Possibly the most important feature, though, is the speed of the card. It comes overclocked from the factory. It also uses a third party cooler in order to reduce noise and temperatures.