This is why I don't ask anyone on this forum about much of anything.
You asked if anyone knew if a Xeon CPU would bottleneck your 560 Ti SLI configuration. All you got was people calling you names ('Hipster' and the like) and telling you you are wasting your money, just buy a i5 2500K.
O M G! Someone wants to try something different! How could they?!?!? Just buy everything we buy because we have the best stuff there is and all your junk is crap.
Welcome to OCN, the new version.
Here's a run of some benchmarks where the Xeon E3 1230 outperforms the i5 2500K in most applications they test and has a lower power consumption. Obviously all at stock settings.
In a quick search I can't find any benchmarks for gaming with a similar Xeon to the one you mentioned.
I found that link earlier, but it had zero game benchmarks