BioShock Infinite
BioShock is fantastically playable and looks great on the PC. We benchmark a 60-second section near the start with all available eye-candy turned on.
The reasonable assumption is that the 8GB card will still be a touch faster due to memory running at 5,500MHz instead of 5,300MHz. The actual margin may be smaller due to, potentially, looser timings employed on the 8GB buffer. There is no difference between the two at a 4K resolution where an overclocked GTX 980 is up to 40 per cent faster.