I was tampering with my GTX 970 recently and I ended up underclocking, I think, according to Valley Benchamrk. Before I started with it on MSI afterburner I ran Valley 2 times and got 123 and 124 fps but after I started toying with the numbers in Afterburner I ended up with highs of 51 and 52. Is it possible that I underclocked the card ? And how do I get it back to the settings it was before?