LOL? A 680MX is like what? A 660TI desktop card? Midrange at best. Not comparable to a 670/680 or the new 780 GTX cards. Those are high end cards (and even then you can always go up from their, by simply running two or more cards in SLI). Something you simply cannot do in an iMac. I'm not saying the iMac is bad per se for gaming, I just don't think that's what it is really buildt for. But let's be realistic the iMac is also not something hardcore gamers would get. It's just more of a work or personal computer that has enough oomph to play one or two games and it's fine for that. Just please don't call the 680MX high end!
Like I said, these cards overclock ridiculously. 6800 3DMarks in stock form, up to 8400 3DMarks in overclocked form. That is fantastic for a system that came out in December, 2012. Again, this is a minor overclock, and not a I-hope-it-makes-it-through-the-benchmark-without-crashing overclock.
Also, did you see the size of the iMac? Now look at the 770 or 780 or even the 660 and 670/680 cards? See how huge they are? You don't think it's impressive that Apple fit an entire computer in there, all running with ONE FAN? Way to ignore that information!
It only plays one or two games? lol. Tell that to my Steam library, because you're simply wrong.
And for reference, here's my iMac, built in 2012, running 3DMark 2011:
i7 3770, Geforce MX 680GTX
http://www.3dmark.com/3dm11/6951603
And here's my buddy I referenced earlier, who just spent $1100 on just a motherboard, CPU, GPU, and RAM in mid 2013:
i7 4770K, Geforce 770GTX
http://www.3dmark.com/3dm11/6951444
Clearly his is faster, yes. But are you going to tell me the iMac can't be used as a gaming machine?
Mate, the Internet tells me that you're not playing FC3 at High at 1440p. The 680MX isn't nearly as powerful as the actual 680, which pushes only 70 FPS at 1920x1200 @ high.
I can run FC3 at 1440p at 60fps, but not at the highest settings. I'm actually pretty picky about framerates, and run FRAPS to make sure I'm at 60fps solid. Far Cry 3 is one of very few special cases where I need to tone down things a bit, absolutely. 1080p at 60fps is simple, though. Crysis 3 is another matter, of course.
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I'm really not sure what the arguing about is, though. The high-end iMac is as a matter of FACT an excellent gaming machine. I should know, because I actually OWN one, and enjoy hassle/crash-free gaming on an almost daily basis with it.
Do we always want faster machines? Why not?! I'll take a 780GTX in an iMac. But to go around saying that the current iMac is not a gaming PC (among its other traits) is sheer nonsense.