it depends on how powerfull the next iteration of consoles are, and how well they sell...
if there as powerful as a high end pc then your looking at 2 years. "ie" a i5 3750 hd 7870 4gigs+ of ram.
if there equivalent to low end pc's "ie" a 3.0 core 2 quad and a 6770 with 1-2 gigs of ram then you can be sure that your system will last at least at least 5 years.
on average a pc has to be 10% more powerful to run the same games at comparable rez and settings because of windows taking up more resorces than the consoles ui.
the chances are they will have an initial build cost of around $600 then retail for $400 or less and take a loss on the first 3 years like the last gen did. i cant see sony or m.s taking a bigger hit and i dont see console gamers paying 1000 for there next console regardless of how powerful they are.
You have a good PSU so no worries and like I said before 2 to 3 years because the technology is coming on faster with every year. Sure you could use that GPU for 5 years but it's the games.
They are getting better and better all the time requiring the top of the line GPUs. I just got my rig last July and my card are last generation cards and they are outdated already.
If the new cards coming out with 3 and 4 GB of Vram then you would have to agree they are not just doing it for eye candy. They are doing it because of the new stuff that will be coming out soon. Anyway I hope this helps and good luck on your rig. Cheers
My old Core 2 Duo @ 3.3GHz, ddr2 ram and 6670 can play games just fine. Gotta tweak 'em and download a few .dlls, but I can get every modern game working fine on my compy.
Your system will last for as long as you want it to. Me? I wish I would have your system in five years. I'll probs have some 2nd hand computer from Craigslist. Again.
I am just curious about if you play BF3 what are your settings? The reason I ask is I know some one who has a set up close to you and he has asked me to find out. Do you get any laging asuming you play the game?