Whenever a new CPU or GPU is about to come, overclocking is one of the things people worry about most. Same was the case with the Ivy Bridge launch. Sandy Bridge was a pretty good overclocker, you can easily run it at around 4.8 GHz to 5 GHz using air cooler 24/7. So, people’s expectations with Ivy Bridge were even higher but there were rumours that Ivy Bridge wouldn’t be as good overclocker as Sandy Bridge. Though Intel has increased the multiplier to 63 but still its not as good as Sandy Bridge in terms of overclocking; atleast not on air.
Intel Core i7-3770K being a 22nm processor has very low stock voltage. It hovers around 1.0-1.1V all the time but temperature is higher than Sandy Bridge even at lower voltage most probably because of Tri-Gate transistors. There is one other reason being high operating temperatures, it the 22nm manufacturing node. Being a small package, heat cant escape easily which results in higher temperatures.
We were able to overclock our Intel Core i7-3770K to 4.64 GHz with 101 MHz base clock and 46 multiplier. That’s around 32.4% overclock over the stock clocks. This is no good as compared to Sandy Bridge standards but unfortunately that’s all you get with Ivy Bridge. The maximum some chips might be able to achieve is around 4.8 GHz on air but on LN2, an overclocker took the Core i7-3770K all the way to 6.16 GHz (that is something Sandy Bridge couldn’t achieve).
Though there is one bright side to it. Ivy Bridge has considerably low power consumption at overclocked speeds and performs almost same as overclocked Sandy Bridge counterparts.
Lets see how much performance improvement Core i7-3770K brings when its overclocked.
That’s around a 24% improvement over the stock clocks.
Here we see a 16% improvement.
x264 HD Benchmark:
Here we see a 19% improvement in pass 1 and around 23% improvement in pass 2.
Gaming performance doesn’t get any performance boost when CPU is overclocked.
At idle, we see a negligible power consumption increment when CPU is overclocked but at load we see around 37% increment in power consumption.
Idle temperature increased only by 3 points when the CPU is overclocked while load temperature shoot up to 76°C; that’s 29% increase over stock clocks.