We would like to thank the following companies for supplying and supporting us with our test system hardware and equipment: Intel, ASUS and Corsair.

Looking at our testbed there's nothing out of the ordinary when it comes to the components we'll be using today. Before we get into the performance side of things, though, we'll just quickly cover the cards that you will see in the graphs here today.

Along with the Sapphire HD 7870 2GB OC, we'll have the HD 6950 2GB, HD 7770 2GB, HD 7850 2GB and HD 7870 2GB which are all clocked at the default reference speeds. The main thing we want to see is what kind of performance boost we get from the overclock when compared to a reference clocked model.

Along with those cards we've also got the HD 7950 and HD 7970 thrown into the mix for good measure along with a couple of NVIDIA based cards that include the GTX 560 Ti, GTX 570 and finally GTX 580.

Let's get started!

The FPS Numbers Explained

When we benchmark our video cards and look at the graphs, we aim to get to a certain level of FPS which we consider playable. While many may argue that the human eye can't see over 24 FPS or 30 FPS, any true gamer will tell you that as we climb higher in Frames Per Seconds (FPS), the overall gameplay feels smoother. There are three numbers we're looking out for when it comes to our benchmarks.

30 FPS - It's the minimum number we aim for when it comes to games. If you're not dropping below 30 FPS during games, you're going to have a nice and smooth gaming experience. The ideal situation is that even in a heavy fire fight, the minimum stays above 30 FPS making sure that you can continue to aim easily or turn the corner with no dramas.

60 FPS - It's the average we look for when we don't have a minimum coming at us. If we're getting an average of 60 FPS, we should have a minimum of 30 FPS or better and as mentioned above, it means we've got some smooth game play happening.

120 FPS - The new number that we've been hunting down over recent months. If you're the owner of a 120 Hz monitor, to get the most out of it you want to get around the 120 FPS mark. Moving from 60 FPS / 60 Hz to 120 FPS / 120 Hz brings with it a certain fluidity that can't really be explained, but instead has to be experienced. Of course, if you're buying a 120 Hz monitor to take advantage of 3D, an average of 120 FPS in our benchmark means that in 3D you will have an average of 60 FPS, which again means you should expect some smooth gameplay.