I've been told L3 Cache isn't that important but I've also been told it does benefit higher end gaming. My GTX 750 Ti Sc that I installed this morning has been doing wonders. Though of course I don't have Titanfall but I've seen several videos on youtube now stating that the EVGA GTX 750 Ti Sc plays titanfall better than the Xbox One. Though that may also rely on the processor an ram that you have as well.
Overclocking IMO is for ethusiats only. It's like taking an everyday commuter car down a open highway as fast as the speedometer reads for miles on in. Yeah the speedometer reads 120mph an you got up to 125-130mph. Was it worth the extra wear on the car? Probably not. It's basically just for curiosity because the risk of overclocking isn't usually worth the benefit which in most cases is miniscule at best.
So I wouldn't take any chances an ruin a perfectly good CPU but if you are into that go for it your decision. Personally If I had extra money an already had a computer that was doing good I'd go ahead and start a new build. Start off with the CPU, Motherboard & Case an go from there.
Also If you are into the GTX series they will probably release more higher end cards later this year sometime on the same architecture as the GTX 700 series that will be more suited for serious gaming. When I say serious I'm talking about multiple monitors an stuff. Things only dedicated enthusiasts usually pursue for a gaming rig. Also, they have G-sync that is gaining popularity but right now there is only like 1 monitor that supports it. Not sure what it actually does.
anyways enough rambling just be wise an most importantly take your time an do hours an hours of research before making a purchase. So you know the odds are in your favor that you are going to get what you wanted for the right price
Thanks, will do