He has the money and wants a faster computer. He's been talking about doing this for a few months now. I doubt he'll ever need SLI but the PSU and MB can do it if needed. Is the 4770k that much faster than an 930?
Performance wise yes.
http://cpuboss.com/c...l-Core-i7-4770K -- In these results you'll see that it has 2x performance improvement. These are aggregate benchmarks testing various things. The reason for such an increase has a-lot to do with the fact that Intel doubled the size of its floating point (FP) vector units (starting in generation 2 I7s) so it skews the improvement toward the 100% range. Take note that the aggregation also includes memory intensive, and non-floating point operations which will not see nearly as good improvement as the FP operations.
The best I found for non-FP ops is the following:
http://www.cpu-world..._i7_i7-940.html -- In these benchmarks you'll see integer operations are seeing 20-30% better performance. Note the compression benchmark in particular. (you need to switch to the benchmark tab after going to this link).
So at a minimum, I would say that 20% improvements is nothing to take for granted.
Now whether, he is actually doing computationally intensive tasks (FP operations or otherwise), I make no comment on. I'm generally of the opinion that 95% of people can get along with a celeron dual core just fine.