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."
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