INTRODUCTION : TweakTown, a very well known tech website, broke Intel’s NDA (Non Disclosure Agreement) due to which we got the reports of benchmarks tests and results of the Haswell refresh replacement of the i7-4770 CPU.
Few years ago, TweakTown broke off a similar NDA with NVIDIA which lead to discontinuation of the supply of review samples to the website for testing, could this be the starting of another conflict?
Anyways, the disclosure of the benchmarks revealed the the real-time performance of i7-4790 against other Intel CPUs and one AMD unit.

DETAILS : In our previous reports about the Haswell Refresh Lineup, it is long said that Haswell Refresh would be based on same 22nm 3D tri-Gate transistor technology and Haswell micro-architecture featured on 4th generation Haswell chips which were launched at June 2013 at Computex but would feature slightly bumped up base and boost clocks which was 100 MHz as a standard for all refresh counterparts of the previous Haswell. The complete Haswell Refresh comprises of 26 desktop CPUs which belong to the Normal SKUs, the Low voltage SKUs and the Ultra Low Voltage SKUs. Unfortunately, The K series of unlocked CPUs belonging to the Haswell Refresh lineup would be launched at Computex 2014 expected in June along with the Devil’s Canyon Haswell Enthusiast level CPUs and X99 platform. That way, the Haswell Refresh CPUs would fill up the space where Broadwell should have been because the 14nm Broadwell CPUs (also known as 5th Gen) is already officially delayed by Intel. Coming to i7-4790 specifically, it is already known to us that this CPU would be the replacement for the i7-4770 (non K) and has exactly similar specs other than the 100 MHz higher base clock (3.6 Ghz) and boost clock (4.0 Ghz)

Haswell refresh : Core i7-4790

Haswell refresh : Core i7-4790

RESULTS : According to the leaked benchmarks, there’s not a huge difference that you would feel in real time performance over i7-4770. benches do conclude that the refresh chip is 3-5% faster than the i7-4770 which is not at all note mentioning. More, the Gaming performance is totally identical to the i7-4770.

Intel Core i7-4790 benchmark

Core i7-4790 : Hyper Pi Benchmark

Core i7-4790 : Hyper Pi Benchmark

Core i7-4790 : Cinebench Benchmark

Core i7-4790 : Cinebench Benchmark

CONCLUSION : The story remains same as it was when Haswell came out to replace Ivy Bridge (But the fact remains that it was a Tock cycle in Intel’s Tick-Tock principle while this is just an upgrade). If you own the older chip (i.e. i7-4770) then there’s no need to switch to i7-4790, but since the pricing is same as i7-4770, people who want to assemble a new system with i7-4770 for a non-OC rig should consider i7-4790 since the extra 100 MHz would be more value for money.