PCIe 2.0 x 16 or 3.0 x 16 slot for 7970?

wingclip

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Aug 9, 2012
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Hi folks,
I have an Asrock Z 77 Extreme 4 motherboard. Among other things, it offers a PCI E2 .0 x 16 and PCI E3 .0 x 16 VGA slots.

Yesterday, I installed a 7970 graphics card and I placed it in the PCI E2 .0 x 16 slot. According to GPU Z, the graphic card reports that it supports PC IE by 16 V3 .0.

Does that mean that to get the full potential of the 7970 I should install it into the PC IE 3.0 x 16 slot?
Thank you,
Rich