Sapphire HD 7970 Dual-X
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SAPPHIRE Radeon HD 7970 3GB 384-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card OC with Boost
The extra large heatsink supports a higher core clock. It has copper heatpipes that quickly dissipate heat. Similar performance to the R9 280X.