Looks like the Radeon cards are still massively outperforming the nVidia cards, which is consistent with the two posts above mine.
I have an i7 4790S (stock 3.2 GHz), Asus H97 ProM 4, 16 GB 1600 MHz, Samsung 840, and an EVGA GTX 970 SCX 2.0. BruceX = 23s. The Radeon R9 280 above got 15.5s and...