Introduction

With the AMD Radeon HD 7990 video card not out yet and still a few months away, if you're looking for some dual GPU action with the new HD 7000 series, then you're going to want to look down the path of CrossFire. Already impressed with what the HD 7970 can do in CrossFire the next thing we wanted to do was see what happens when we take the time to overclock the video cards.

So far we've had some good success when it comes to overclocking which we looked at in our HIS HD 7970 and XFX HD 7970 Black Edition Double Dissipation review. Adding a second card into the mix is known for limiting overclocking ability as cards are placed together and more heat is generated. Those numbers are then amplified due to the added voltage being thrown through the core of each GPU.

Since we've already looked at the Sapphire HD 7970 in our original CrossFire review, we won't need to have a look at the card again. Instead we'll get straight into the testbed setup and quickly cover how we went with the overclock. Once we've done that we'll just get straight into the performance.

So with that all said and done let's get into it and see what's going on with CrossFire HD 7970 overclocking.