Overclocking study – Intel Core i7 4790K & Intel Pentium G3258 – air, water, phase-change, DICE & LN2
Architecturally speaking the Core i7 4790K is the same as the Core i7 4770K, released more than a year ago. One of the problems regarding Haswell generation processors is the exponential rising of the temperature with the increase of the voltage supplied. This is due to reduced size of the die combined with the use of not so good TIM between the die and IHS. Even if you have a very good CPU cooler you will see the temperatures rising very fast once you stress the CPU, because the heat couldn’t be transferred fast enough from the die to the cooler base (bear in mind that you have the following structure: die -> Intel TIM -> IHS -> your TIM -> cooler).
The Core i7 4790K is running at a base frequency of 4GHz with the Turbo Boost allowing it to reach 4.4GHz for light single-threaded applications. This means the 4790K will be a much faster CPU out-of-the-box than the existing 4770K which is running 500MHz lower. For this frequency to be possible, Intel had to raise the VID for the CPU’s and do something about the heat problems and. The solution came through a new and improved TIM between the die and the IHS, although it will have been better if the IHS was soldered to the die like in the Sandy Bridge era.
Although Core i7 4790K is a performance monster, the real star of the show is the dual-core, non Turbo Boost Pentium Anniversary Edition. With a price tag of only 72$, the Pentium G3258 is a fully unlocked dual-core Haswell based CPU, having the operating frequency set at 3.2GHz for a TDP of only 53W. The frequency doesn’t really matter because having only 2 cores it will probably overclock like crazy and nobody will keep it at default clocks.