If Firestrike scores are the only measure heck that 1552mhz run should be enough for a 960 to replace 780s.
Only if you live in a bizarro world where OC gains equate to real world performance increases. Even the most casual tech reader would realize that OC 'ing becomes a case of diminishing returns.
The AiBs 750 Ti OC also had similar scores to reference 660s
W1zzards MSI GTX750Ti OC
fell 17% shy of the 660 in his review. Not that dissimilar to the Firestrike Extreme scores. With the same 4770K, the MSI 750Ti OC
scores 2053 while the
660 scores 2282 - a 11% deficit and ballpark considering it is a single benchmark rather than the aggregate of sixteen games.
but failed to even keep up with 650 Ti Boost.
And? W1zzards latest review
pegs the 650 Ti Boost at 9.4% faster than the 750 Ti at 19x10, while the Firestrike Extreme pretty much mirrors the same differential with the
650 Ti Boost at 2265 which gives it a 10.3% lift (compared to the 2053 score linked above). That's a whole 0.9% difference between the review and a single benchmark.
Out of the 5 W1zzard reviewed only 1 managed to outperform the 650 Ti Boost, which needed a base OC of 182. The 650 Ti Boost was cheeper too at $130 compared to a 750 Ti which ranged from reference $150 - $200.
Wow, that's a shocker! Never would have guessed that a brand new model would sell at a premium over an outgoing card. You might be imparting worthwhile information except:
1. Not news. For example, the R9 285 produced ~9% less performance than the lower numbered 280X, but was
only 4% lower in price.
2. The 750 Ti's price realigned (as did the 285's) once the NEWCARDOMG!!! factor had worn off, to the point where
you can buy one for $100, while the aforementioned GTX 660
will set you back $130 (or 30% more cost for ~20% more performance over the 750 Ti), or
$120+ for the 650 Ti Boost (that's 20% more cost, 10% more performance to save you having to break out the calculator).
So, no, IMO the 960 won't replace the 780, and Firestrike is a pretty decent indicator of performance - a performance that is predicated upon the clocks, cooling, and system being run.