My CPU is getting up there in years and my PC is an OEM build, so no overclock here. I've seen where Watch Dogs has massive CPU requirements and noticed that Crysis 3 is nearly maxing out my CPU. I read where the latest Nvidia drivers are supposed to reduce CPU bottlenecks and the next-gen GTX 800 series video cards will have integrated Tegra CPUs. I'm a bit concerned about my CPU possibly bottlenecking a GTX 870 when that comes out, but I learned that Project Denver should reduce CPU bottlenecking. I'm using the stock CPU heatsink and the CPU will average about 78°C when running AAA games. Is it safe to say that it's worth upgrading to a 4770k and z87 motherboard, wait for 5th gen Core i7 and compatible motherboard, or keep what I have? I don't want to spend about $700 for a CPU / MB / Windows upgrade unless I have to and I know that X58 motherboards are hard to come by these days.