Hi. No, the cards were used for 3D rendering, i'm not a gamer as such :)
I've since built another frame like this with the additional cards on it - the Nvidia GPU's were a little overlooked by miners originally due to their high price - but as AMD cards sold out people began looking at alternatives. I tried the 1070 early on - before they all went out of stock and found I could get batter 'Hashing' speeds out of them at lower power usage than the AMD cards :) - About a month later - try buying a 1060 or 1070 card in the UK - everyone has caught on! The 1060 is the sweetspot IMO and it's also the card that Nvidia are making a mining only variant of :)