GTX 560 sli or GTX 600 series?

[THUGLIFE505]

Hello I have a EVGA GTX 560 2GB (no ti). I can run most games on max but there are a few like farcry 3, witcher 2, crysis 3 and a few more that i can't. Would two GTX 560s run most games on max settings and is there any downside besides heat in using two 560s SLI compared to GTX 600 series? I heard that the 600 series has features such as tessellation that the 500 series dont. Also If I do use 560 SLI what would it compare to I found benchmarks on 560ti SLI but not 560 no ti. I get pretty good temps in my rig so I'm not really worried about heat. Should I get another 560 or somthing better?
System specs
i5 3570k
GB z77x d3h
8GB DDR3
EVGA 560 2gb
Corsair GS800
WD 1TB Blue
HAF 912 with 5 Fans

 

[spawnkiller]

i had 2 ASUS 560 Top version (non ti) and a single 680 is 15-20% faster in newer games and about the same in older ones like BF2...

I changed cause i've sells both for 300 and got my 680 for 425$ so only 125$ and no need for driver optimisation as SLI is always a "try" you can't always have double the FPS as it's never scaling the same depending on drivers, etc... when a single card is as fast and faster in all the games that doesn't scale correctly...

I would take another 560 if you can have one for 100$ not more, if not, sell our 560 (it still worth a couple of bucks, maybe 80-100$) and buy a 660ti (it'll about be the same performance as a 560 sli as a 670 is only 5%-10% slower than my 680 and the 660ti is another 5-10% slower than the 670 so 20% max slower...)

If you sell your 560 100$ the 660ti only cost you 120-150$ so the same as another 560 but you'll have constant performance with no troubles from the SLI scaling...

 

[cuecuemore]

Yes, there are big advantages to the 600 series over 560s in SLI. The 560 does not have the VRAM or the memory bandwidth to handle those new games. The cores are good, but still a little underpowered. If I were you, I'd wait for the next generation (scaled down Titan or whatever) instead of jumping into the 600 series.